Merge pull request #20 from tienvx/features/field-group-support

Features/field group support
Merge pull request #23 from tienvx/features/enabled-modules

Features/enabled modules
Update at_doc.info

+ package to module info file.
Add features support.
Fix warning.
Merge branch '7.x-1.x' into features/features
Merge pull request #25 from tienvx/features/features

Features/features
Don't print disabled modules.