Add python coding standards

As discussed at tech forum 24/4/2014
Add DjangoJS JavaScript testing notes.
Include js testing screenshot

Also link js testing proposal into index page.
Fix README indentation
Update js-testing.md

More descriptions and examples under the different testing strategies.
Document our default license
Merge branch 'master' into highlevel

* master:
  Document our default license
  Update js-testing.md
  Fix README indentation
  Include js testing screenshot
  Add DjangoJS JavaScript testing notes.
  Add python coding standards