Updated Privacy Policy

Updated Privacy Policy in details.
Merge pull request #30 from mitraj/release-6.2

The Class drop down list should stick to teach tab issue resolved
Merge pull request #31 from anilgooru/release-6.2

Updated Privacy Policy
Navigation Confirmation popup has implemented
when closing the player without submiting the openended question answer.
Merge pull request #32 from shivalinga/master

Navigation Confirmation popup has implemented
Displaying resource and question count for the collections : Implemented for more-info for resource and collection-resource players and resource-search more-info pages.
Merge pull request #33 from chandrasekharv/release-6.2

Displaying resource and question count for the collections : Implemented for more-info in resource/collection players and more-info of the resource-search
Mixpanel events added for OER Resouces in Search