Story 53333047: added objective mapping to sections tree
Merge remote-tracking branch 'origin/develop' into feature/objectives_ui

Conflicts:
	src/ggrc/assets/javascripts/sections/section.js
Remove overwritten 'SectionObjective' model
Enable Section tree's "openclose" toggle for objectives
Merge pull request #100 from reciprocity/feature/objectives_ui

Mapping of sections to objectives