Added new classes for new landing page.
Merge remote-tracking branch 'upstream/dev-branch' into dev-branch

* upstream/dev-branch:
  removed disclosure panel for few options on filters and made other changes for filter UI on search page.
  National Geography and Youth Voices Libraries implemented

Conflicts:
	src/main/java/org/ednovo/gooru/shared/i18n/MessageProperties.java
	src/main/java/org/ednovo/gooru/shared/i18n/MessageProperties.properties
Merge remote-tracking branch 'upstream/dev-branch' into dev-branch

* upstream/dev-branch:
  rectified issue with clearing the filters for resource format.
  Updated API included + banner images refined
  Fixed Copy right tool tip text spacing ui issue.
added landing page.
Merge pull request #1062 from anilgooru/dev-branch

Implementing new Landing page.