not playing collection in student view issue has been fixed.
Merge pull request #1810 from shivalinga/dev-branch

not playing collection in student view issue has been fixed.
Merge pull request #1812 from suryanarayanakb/dev-branch

"analytics reports"
1.Fixed displaying class info bug.
2.changed data logs events parent id from classpage id
to unit id.
Merge branch 'dev-branch' of https://github.com/Gooru/Gooru-Web into dev-branch

Conflicts:
	src/main/java/org/ednovo/gooru/server/request/UrlToken.java
Merge pull request #1813 from shivalinga/dev-branch

Fixed displaying class info issue,changed data logs events  parent id value
Analytics null handling implemented
Merge pull request #1815 from ssushma/dev-branch

Analytics null handling implemented
Missing file has been commited.
Merge pull request #1816 from shivalinga/dev-branch

Missing file has been commited.
1.1 QA [My Classes] Directions are displayed at minimum score and Due Date are not displayed at Unit details page when assignment assigned from library Share
Merge pull request #1818 from RavindderV/dev-branch

1.1 QA [My Classes] Directions are displayed at minimum score and Due Da...
Changes for edit button and delete class buttons
Merge pull request #1819 from ssushma/dev-branch

Changes for edit button and delete class buttons
unit title will not accept empty space characters as title
Merge pull request #1820 from ssushma/dev-branch

unit title will not accept empty space characters as title
Merge remote-tracking branch 'upstream/dev-branch' into dev-branch

Conflicts:
	src/main/java/org/ednovo/gooru/client/mvp/analytics/util/HCLineChart.java