Ccplot

* Added support for arbitrary dataset plotting (experimental).
* Added ccplot API functions (experimental).
* Removed dependency on PyNIO. ccplot now uses its own HDF reading module,
interfacing with libhdf4 and libhdfeos.
* Support for Windows.
* Support for Mac OS X.
* CALIPSO LIDAR altitudes are now read from the product file instead of being
hard-coded in ccplot.
* Automatic unit testing performed by Travis CI.
* ccplot now looks for colormaps in a directory relative to the executable.
This fixes installation in non-standard paths.
* New man page in ronn.

* Fix type cast bug with numpy 1.7

* Changed backend back from cairo to AGG (though not GTK AGG as before),
because matplotlib enforces limitation on the number of line points with
cairo to 18980, which is not enough for basemap.

* Fixed numpy include path in setup.py.
* matplotlib is imported with the cairo backend, so that X server
is not required to be running.
* Updated installation instructions in INSTALL.

* Support for changing meridians and parallels through the meridiansbase,
parallelsbase, nminormeridians and nminorparallels options.
* Updated installation instructions in INSTALL.
* Updated information in README.

* Wrong dimension mapping of MODIS Swath near 180E was fixed.
* Missing meridians on polar plots were fixed.
* Projection options like central latitude, central meridian,
bounding latitude and latitude of true scale
can now be set with the -p switch.
* Wrong interpolation radius calculation on Equidistant Cylindrical
plots was fixed.
* Ticks on profile plot are now more dense by default.
* Sufrace elevation line can now be plotted for CALIPSO profile products
(and is on by default).