Refactoring form element.
Removed obsolete collection test.

Collections can be achieved by setting the multiple attribute on a standard entity element.
Merge pull request #128 from SpiffyJr/feature/form-element-refactor

Refactoring form element.
Updating minimum doctrine-module version
Cleaning up remaining (currently broken) tests
Clean docblock and add deprecated for DoctrineEntity
Merge pull request #140 from bakura10/form-elements/cleanup

Clean docblock and add deprecated for DoctrineEntity
Update docs/configuration.md

register type mapping
Update docs/configuration.md
Update docs/configuration.md
Merge pull request #143 from volkan/master

How to register type mapping
Update docs/configuration.md

How to add new type
Update docs/configuration.md
Update docs/configuration.md

How to Use Two Connections
Adding master alias to allow installation of `0.*`
Merge pull request #144 from volkan/master

How to add new type
add more specific element type for bool and boolean
Initializing collector by subscribing to ZDT init event
instead of checking for variable in config.
Adding comments.
Adding collector name.