Merge branch 'release-0.1' into develop
Added composer.phar to .gitignore.
Minor improvements to logging.
Improved docs and examples, added PDF generation.
Added dump() method to QuerySet.
Fixing a test which fails on some dbs.
Implemented transactions.
Replaced callable type hint with is_callable()

To retain compatibility with PHP 5.3 (callable type hint was added in PHP
5.4).
Added testing on PHP 5.5 (failures allowed)
Updated README and TODO.
Added query logging via Apache log4php.
Updated CHANGELOG, minor docs fix
Improved transaction handling

DB::disconnectAll() will now call DB::rollback() if in transaction. Also
removed DB::disconnect() since it could create some strange edge cases
when in global transaction.
Implemetned composite filters
Removed usage of short array syntax (5.3 compatibility).
Fixed bug where Filter::_or() returned AND filter.
More tests, minor fixes.
Added docs for composite filters.
Updated version and release date for 0.2
Merge branch '0.2'