Merge pull request #1651 from anilgooru/release-6.6.3.a1

Updated from icon to png image.
Library: Implemented LUSD district library.
Merge branch 'release-6.6.3.a1' of https://github.com/Gooru/Gooru-Web into release-6.6.3.a1
Merge pull request #1786 from VinRudramurthy/release-6.6.3.a1

Library: Implemented LUSD district library.
Library: updated ccst library banner image.
Merge branch 'release-6.6.3.a1' of https://github.com/Gooru/Gooru-Web into release-6.6.3.a1
Merge pull request #1800 from VinRudramurthy/release-6.6.3.a1

Library: updated ccst library banner image.
Updated the district library names in the dropdown and on landing page.
Merge branch 'release-6.6.3.a1' of https://github.com/Gooru/Gooru-Web into release-6.6.3.a1
Merge pull request #1811 from VinRudramurthy/release-6.6.3.a1

Updated the district library names in the dropdown and on landing page.
Library: Implemented TICAL partner library.
Merge branch 'release-6.6.3.a1' of https://github.com/Gooru/Gooru-Web into release-6.6.3.a1
Merge pull request #1854 from VinRudramurthy/release-6.6.3.a1

Library: Implemented TICAL partner library.
Issue rectified with display of teacher tips on collection player.
Merge branch 'release-6.6.3.a1' of https://github.com/Gooru/Gooru-Web into release-6.6.3.a1
Merge pull request #1858 from VinRudramurthy/release-6.6.3.a1

Issue rectified with display of teacher tips on collection player.
Disabled Mixpanel....