When creating a repository, the name field previously allowed the name to 

be 65 characters long. Once the name got to 65 characters, you would not

be able to type any additional characters.
Now, you are allowed to specify a name that is less than or equal to 255

characters long.

Ran ./reviewboard/manage.py evolve --execute
  evolve to update 

  the database
Restarted my server
Manually Tested by

Clicked on the add button for Repositories
Specified a name that was 255 characters long 
Clicked save
Got no Errors
Verified that the name shown in my list of repositories was 

    255 characters long


Added a unit test to verify creating a repository name with 255 

  characters works, and does not produce errors