Adding ability to delete Idea from IdeaThread

see #13

- removes related IdeaThread if it's the last one
- added hasPermission(user_id) Handlebars helper
Ability to edit ideas, which destroys all their votes
fix checkVote method. closes #13
Merged master for updated styles
update idea edit form
Fixing edits creating forms in all threads
Edit/Destroy controls along with a cancel button
Merged parent branch
Merge pull request #20 from cremalab/idea-edit-delete-styling-15-rl

Idea edit delete styling 15 rl
Tracking fonts and images
Merge pull request #14 from cremalab/idea-edit-delete-13-rb

Adding ability to edit and delete Idea from IdeaThread