Download project files

Much code improvements
Included gettext and added German translation
Create ~/.mathpyx, if necessary
More Copyright information in files and configuration
Added --edit (under construction)
Added xff path parser
Much improvements in libxff module and mathpyx_console.py
Fixed: spelling errors
Much syntax improvements in XFF
Uses ElementTree now instead of BeautifulSoup to read/write XFFs
The XFFs are now a part of the distribution package
Removed --compile