MIS-GAPP: Edit interface for custom GAPP instances.
Merge pull request #408 from AvadootNachankar/mongokit

group_set field moved from GSystem class to Node class
Merge branch 'mongokit' of https://github.com/gnowledge/gstudio into mongokit-MIS
Reverting changes that done for edit-interface regarding custom app instance.
Patch for adding attribute_type_set and relation_type_set values; and logs implemented.
Skip schema_files directory.
Top bar animation modified for time being.