Added MetaType "GAPP" and made member_of of  each APP
Merge branch 'mongokit' of https://github.com/gnowledge/gstudio into mongokit
content translation module added
conflict resolved
Merge pull request #227 from supriyasawant/mongokit

concept translation module added
language field added
Merge pull request #228 from supriyasawant/mongokit

language field added
language field initiatization modified
Merge pull request #229 from supriyasawant/mongokit

language field initiatization value modified
conflict resolved
Merge pull request #230 from supriyasawant/mongokit

conflict resolved
bug resolved on language fields
Merge pull request #231 from Dhiru/mongokit

bug resolved on language fields
post_node field added to Node class; and collection_set moved from GSystem to Node class.
Code added in order to add/update following fields: post_node and collection_set
Merge pull request #223 from krishna31/mongokit

Added MetaType "GAPP" and made member_of of each APP
Conflict resolved with commit #231
Merged #231 code with some changes
Merge branch 'mongokit' of https://github.com/gnowledge/gstudio into mongokit
bug resolved in language field