use tailon.version in setup.py
transition to backbone.js (part 2)
debugging leftovers
remove unused styles and compress css
bundle argparse (from Py 3.3.1) with tailon

This is necessary because the argparse modules that ship with Py 2.7
and 3.x have different HelpFormatter implementations.
main.CompactHelpFormatter reimplements methods from the 3.x API.
packaging fixes
add screenshots