Gladtex

- replace formatting commands in alt attribute; this shortens the
formula and makes it mor readable
- replace unicode signs also in alt attribute (good for screen reader
users and text-mode browsers)
- recognize upper-case `ENV` attribute of `EQ` tag (so that e.g.
displaymath is recognized correctly)

- treat eq element content as verbatim
- decode HTML entities within formula tags

- handle subprocess stdin and stdout encoding properly
- set UTF-8 as encoding for all LaTeX documents
- add -R option (replace non ascii characters)
- formulas in .htex documents may now contain umlauts or unicode math
characters; conversion will work without adjustments, only -R has to
be specified
- handle encoding better and more strictly for LaTeX 2E

- show user a meaningful error message if LaTeX or dvipng is missing
- setup.py: build manual page, if pandoc present
- freeze multiprocessing on Windows, to make executables distributable

- add formula number in error output; makes tracking of formulas easier in
error case
- write man page
- set css class correctly for display math formulas
- HTML label/id generation:
- do not create overlong id's
- do only generate id's starting with an alphabetical character
- squeeze multiple identical characters
- reparse outsourced formulas correctly (was a mixture of formatted vs.
unformatted formulas)
- do not use absolute links when operating on file which is not in current
working directory
- be more careful with backslashes vs. slashes
- allow formulas consisting only of numbers (i.e. example calculations) by
prefixing "form_" in front of the HTML id (id must start with a letter
but may be followed by digits)
- allow removal of unreadable caches with the `-n` switch (extend library
with this functionality)
- introduce `-m` switch to print the output in a less concise, but more
machine-parseable format

- rewrite GladTeX fully in Python
- allows easy compilation into a binary for a specific platform
- comes with a new library to use GladTeX functionality within other
applications
- fully unit-tested
- enable piping support; GladTeX can read from stdin and write to stdout
- drop -t switch; image is either transparent by default or has a background
color which can be set with -b
- drop -s switch
- introduce -o (output) option
- introduce new cache format containing version numbers; json, so
interface to other programming languages