Improve autoloading code

* Removed custom autoloaders
* Use Composer classmap (psr-0 would require making the dir structure deeper)
* Updated TravisCI config
Fix compatibility with MW 1.22
Merge pull request #6 from wmde/mwcompat

Fix compatibility with MW 1.22
Fix travis irc reporting

Change-Id: I63033fb997275498d9dc9c748dde1b65cab56049
Merge pull request #7 from wmde/irc

Fix travis irc reporting
Revert "Improve autoloading code"

This reverts commit 40513fa4087945a6f9bfb0fec577584bc69a6878.
Merge pull request #8 from wmde/revertautoloadcommit

Revert "Improve autoloading code"