Enable testing on Travis CI
Show the Emacs version before test execution
Add Travis status to README
Use local ip address

Travis doesn't like localhost?
Load compatibility libraries during compilation

Required for successful byte compilation on Emacs 23
Don't require EPL before package.el is available

Actually, we don't need to require it at all, because pkg-info loads it
anyway.
Merge branch 'travis-ci'

* travis-ci:
  Don't require EPL before package.el is available
  Load compatibility libraries during compilation
  Use local ip address
  Add Travis status to README
  Show the Emacs version before test execution
  Enable testing on Travis CI