V1.1 - Implemented changes for WMS, Search by Tag, Add Webmap, My Content and Zoom To functionality

Following functionalities are implemented:
1. Search by Tag Functionality
2. Added "My Content" functionality for authenticated user
3. Extended portal widget to Add WMS layers
4. Added "Zoom To" functionality for each portal item
5. Extended portal widget to Add Webmap
6. Extended portal widget to Add Map Server
7. Resolved defect while adding feature layer
Resolving Conflicts with develop branch
Merge pull request #11 from pradkumar/V1.1

V1.1 - Implemented changes for WMS, Search by Tag, Add Webmap, My Content and Zoom To functionality