Change reference to crewmate in URL, refs #101

Pages that include "Copywrite" have been left out of this commit.
I also fix few occurences left in comments.
Merge pull request #119 from kyzh/url_change

Change references to Crewmate in URLs, refs #101
Link from footer to Teambox's Github page

That's an original source code location
Change gif name crewmate & add copyright refs #101

Included "2013 Crewmate Copyright".
Merge pull request #121 from kyzh/teambox_logo_dot_gif

Change logo name to crewmate, add copyright, refs #101
Change reference to crewmate in views, refs #101

This is mainly changes to api docs and mobile view.
Merge pull request #122 from kyzh/views

Change reference to crewmate in views, refs #101
Change reference to crewmate, refs #101

There is no common theme in this commit.
This is likely one of the last batch renaming commit.
Merge pull request #124 from kyzh/batch_renaming

Change reference to crewmate in seeds and controller, refs #101