Add New Navigation Links and Fix some Logic

* Add Pending Matches Link to Header
* Add Match Link to Header
* Add My Profile Link to Header
* Paginate User Index
* Paginate Match History
* Paginate Activity Feed

* Only the requested can accept a match
* Only the commenter can edit a comment
Merge pull request #36 from elijahkim/ek/add-tabs

Ek/add tabs