Form for picking a user from a list.

Issue #186
Progress on follow user. #186
Get and filter user list. #186
Show a list of users with checkboxes.
Make checkbox selectable. #186
Following a single user works. #186
Update version and copy. #186
Mispelled flootty. #186
Merge pull request #187 from Floobits/enhancement/186/follow_user

Follow a user. Closes #186