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 #38 from kohana/3.3/feat/travis-module-build

Configure Koharness for standalone Travis build
Only load unittest module in bootstrap if not already loaded

The unittest module bootstrap should not make a second
Kohana::modules call unless required, as this may have
side-effects. For preference the unittest module should
already be loaded - eg by koharness.

Also updated so that the module can be loaded from
any path, so that we don't need separate support for
MODPATH vs vendor/kohana/unittest installs.
Update README and add travis build badges
Merge branch '3.3/develop' into 3.4/feat/travis-module-builds

Conflicts:
	bootstrap.php
Update travis configuration and composer dependencies for 3.4 series
Merge pull request #39 from kohana/3.4/feat/travis-module-builds

Add standalone build for 3.4 series