Minor fixes in tests
Fix phpdoc in Collectionhandler - had wrong return types
Convenience magic setters/getters for read and write collections definition.

Modifications in transaction tests
Merge pull request #114 from frankmayer/devel

Some minor additions and fixes
Declared magic properties on class phpdoc-block for IDE autocompletion, etc...
Added missing test to check if single collection definitions, as strings instead of arrays, work.
Merge pull request #115 from frankmayer/devel

Some more minor modifications to transactions
Initial AQL user functions PR.
Some test assertions are disabled because of a bug in ArangoDB. WIll enable later
Regenerated Documentation including transactions and AQL user functions
Merge pull request #116 from frankmayer/devel

Initial AQL user functions implementation