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Merge pull request #171 from makfire/mongokit

Private and public groups implemented
Bugs removed in homogeneous collection module
Merge pull request #172 from sunnychaudhari/mongokit

Bugs removed in homogeneous collection module
Add help blocks in the left off convas
Merge
Upgrade to Foundation 5.1
Placeholder code for group splash screen design
New node details layout
Modified the multiple selection procedure of collection items
Merge pull request #173 from sunnychaudhari/mongokit

Modified the multiple selection procedure of collection items
Merge branch 'mongokit' of https://github.com/gnowledge/gstudio into mongokit
Make lead paragraph in content bold
Hiding sidebar for mobiles
Upgrade to Foundation 5.1.1
Formatting
Add breadcrumb to node detail
Move node view tabs to right
Make group names in nav clickable
Shelf UI implemented