PEP8 fixes.
Avoid DoesNotExist exception after switching to another language.

Changed regex for removing unit parameter from URL. It can be
after # or &.
Readability counts.
Adjust variable semantics.
Fixed bogus comments.
Remove unnecessary extra tabs in makefile
Don't index unit's index, it's useless.
Update CREDITS
Update version
Fix typo
Create assets directory in makefile in order to get make build working
Exclude strings.js from build
Add docs to build
Fix typo in installation docs
These are in assets/ now
Correct location of DistutilsOptionError

This now works and is tested on Python 2.5-2.7
subprocess.call is available on older Pythons
Break out docs into its own target

Also use mo target to as part of build target
Add LICENSE to build MANIFEST
Update Django versions in .travis.yml