Add new idea view
Post idea if signed in
Merge branch 'feature/post_idea' into develop

* feature/post_idea:
  Post idea if signed in
  Add new idea view
Add gravatar for idea show
Add idea show view
Add edit and delete idea controller/views
Add limitation: only owner can edit and delete ideas
github issue: #16 Merge branch 'feature/show_ideas' into develop

* feature/show_ideas:
  Add limitation: only owner can edit and delete ideas
  Add edit and delete idea controller/views
  Add idea show view
  Add gravatar for idea show