Task-Nr: QTCREATORBUG-3433

Broke by recent refactorings.

Reviewed-by: Tobias Hunger

Adds a 'type' attribute to the 'dependency' tag, with possible values
'required' and 'optional'.
Optional dependencies may not be linked against. You'll need to use the
new dynamic methods in plugin manager (retrieving objects and calling
methods by name) if you want to access functionality of optional
dependencies.

Reviewed-By: kh

Some documentation/comment changes.

Task-Nr: QTCREATORBUG-3432

Task-number: QTCREATORBUG-3380

Remove from pluginspec.in as well, complete
b606469a.

Used to be an environment variable.

Merge-request: 225
Reviewed-by: dt <qtc-committer@nokia.com>

(Cmake/Qt4). Use PluginManager invocation facility
for the form class code generation. Do the rest
(testing for form editor, retrieving the editor
contents).

Acked-By: hjk

Reviewed-by: Tobias Hunger

Remove factory class from exported header.

Reviewed-by: Christian Kamm

Reviewed-by: Erik Verbruggen

Reviewed-by: Erik Verbruggen