Scour

* Allow direct calling of the Scour module.

* Fix [Bug 702423](https://bugs.launchpad.net/scour/+bug/702423) to function well in the presence of multiple identical gradients and `--disable-style-to-xml`.
* Fix [Bug 722544](https://bugs.launchpad.net/scour/+bug/722544) to properly optimize transformation matrices. Also optimize more things away in transformation specifications. (Thanks to Johan Sundström for the patch.)
* Fix [Bug 616150](https://bugs.launchpad.net/scour/+bug/616150) to run faster using the `--create-groups` option.
* Fix [Bug 708515](https://bugs.launchpad.net/scour/+bug/562784) to handle raster embedding better in the presence of file:// URLs.
* Fix [Bug 714717](https://bugs.launchpad.net/scour/+bug/714717) to avoid deleting renderable CurveTo commands in paths, which happen to end where they started.
* Per [Bug 714727](https://bugs.launchpad.net/scour/+bug/714727) and [Bug 714720](https://bugs.launchpad.net/scour/+bug/714720), Scour now deletes text attributes, including "text-align", from elements and groups of elements that only contain shapes. (Thanks to Jan Thor for the patches.)
* Per [Bug 714731](https://bugs.launchpad.net/scour/+bug/714731), remove the default value of more SVG attributes. (Thanks to Jan Thor for the patch.)
* Fix [Bug 717826](https://bugs.launchpad.net/scour/+bug/717826) to emit the correct line terminator (CR LF) in optimized SVG content on the version of Scour used in Inkscape on Windows.
* Fix [Bug 734933](https://bugs.launchpad.net/scour/+bug/734933) to avoid deleting renderable LineTo commands in paths, which happen to end where they started, if their stroke-linecap property has the value "round".
* Fix [Bug 717254](https://bugs.launchpad.net/scour/+bug/717254) to delete `<defs>` elements that become empty after unreferenced element removal. (Thanks to Jan Thor for the patch.)
* Fix [Bug 627372](https://bugs.launchpad.net/scour/+bug/627372) to future-proof the parameter passing between Scour and Inkscape. (Thanks to Bernd Feige for the patch.)
* Fix [Bug 638764](https://bugs.launchpad.net/scour/+bug/638764), which crashed Scour due to [Python Issue 2531](http://bugs.python.org/issue2531) regarding floating-point handling in ArcTo path commands. (Thanks to [Walther](https://launchpad.net/~walther-md) for investigating this bug.)
* Per [Bug 654759](https://bugs.launchpad.net/scour/+bug/654759), enable librsvg workarounds by default in Scour.
* Added ID change and removal protection options per [bug 492277](https://bugs.launchpad.net/scour/+bug/492277): `--protect-ids-noninkscape`, `--protect-ids-prefix`, `--protect-ids-list`. (Thanks to Jan Thor for this patch.)

* Fix [Bug 541889](https://bugs.launchpad.net/scour/+bug/541889) to parse polygon/polyline points missing whitespace/comma separating a negative value. Always output points attributes as comma-separated.
* Fix [Bug 519698](https://bugs.launchpad.net/scour/+bug/519698) to properly parse move commands that have line segments.
* Fix [Bug 577940](https://bugs.launchpad.net/scour/+bug/577940) to include stroke-dasharray into list of style properties turned into XML attributes.
* Fix [Bug 562784](https://bugs.launchpad.net/scour/+bug/562784), typo in Inkscape description
* Fix [Bug 603988](https://bugs.launchpad.net/scour/+bug/603988), do not commonize attributes if the element is referenced elsewhere.
* Fix [Bug 604000](https://bugs.launchpad.net/scour/+bug/604000), correctly remove default overflow attributes.
* Fix [Bug 603994](https://bugs.launchpad.net/scour/+bug/603994), fix parsing of `<style>` element contents when a CDATA is present
* Fix [Bug 583758](https://bugs.launchpad.net/scour/+bug/583758), added a bit to the Inkscape help text saying that groups aren't collapsed if IDs are also not stripped.
* Fix [Bug 583458](https://bugs.launchpad.net/scour/+bug/583458), another typo in the Inkscape help tab.
* Fix [Bug 594930](https://bugs.launchpad.net/scour/+bug/594930), In a `<switch>`, require one level of `<g>` if there was a `<g>` in the file already. Otherwise, only the first subelement of the `<g>` is chosen and rendered.
* Fix [Bug 576958](https://bugs.launchpad.net/scour/+bug/576958), "Viewbox option doesn't work when units are set", when renderer workarounds are disabled.
* Added many options: `--remove-metadata`, `--quiet`, `--enable-comment-stripping`, `--shorten-ids`, `--renderer-workaround`.

* Fix [Bug 517064](https://bugs.launchpad.net/scour/+bug/517064) to make XML well-formed again
* Fix [Bug 503750](https://bugs.launchpad.net/scour/+bug/503750) fix Inkscape extension to correctly pass `--enable-viewboxing`
* Fix [Bug 511186](https://bugs.launchpad.net/scour/+bug/511186) to allow comments outside of the root `<svg>` node

* Fix [Bug 482215](https://bugs.launchpad.net/scour/+bug/482215) by using os.linesep to end lines
* Fix unittests to run properly in Windows
* Removed default scaling of image to 100%/100% and creating a viewBox. Added `--enable-viewboxing` option to explicitly turn that on
* Fix [Bug 503034](https://bugs.launchpad.net/scour/+bug/503034) by only removing children of a group if the group itself has not been referenced anywhere else in the file

* Fix [Bug 449803](https://bugs.launchpad.net/scour/+bug/449803) by ensuring input and output filenames differ.
* Fix [Bug 453737](https://bugs.launchpad.net/scour/+bug/453737) by updated Inkscape's scour extension with a UI
* Fix whitespace collapsing on non-textual elements that had xml:space="preserve"
* Fix [Bug 479669](https://bugs.launchpad.net/scour/+bug/479669) to handle empty `<style>` elements.