INTEGRATE: Travis CI integration

* dev:
  Minor tweaks to README
  README documents pull request process
  Mild improvements to build parameter documentation
  Build script documentation
  Travis CI badge at top of readme
  Travis CI uses new one-step build
  Can run Karma in CI mode without running 'jake start'
  Better separation of concerns between Karma runner and build
  Run tests on Firefox in Travis-CI
  'jake karma launchkarmabrowsers=...'
  Basic Travis-CI configuration