Configure standalone travis build

Adds and configures kohana/koharness to build a skeleton Kohana
application and then uses that environment to run the unit tests
on travis (and locally, if required).

Continues kohana/kohana#50
Disable IRC notifications for kohana builds
Merge pull request #20 from kohana/3.3/feat/travis-module-build

Configure Koharness for standalone Travis build
Add build status badges to the README

The readme itself needs to be redone, logged as #22.

[skip ci] - just a doc change
Merge 3.3/release/3.3.3 into 3.3/master