Added edit section url
Added logic to edit section. Provided the  helper method to invoke the API - needs to plugin the UI logic to invoke this
Merge branch 'develop' into feature/Add_People_Tool

# Via cmsnowden
* develop:
Merge branch 'develop' into feature/Add_People_Tool
Moved the API calls for edit section from the Add people tool to canvas_utils.
Also incorporated some feedback from code review.
Merge pull request #38 from Harvard-University-iCommons/feature/Add_People_Tool

Feature/add people tool