Replace .rvmrc with .ruby-version and .ruby-gemset
There are no ruby files in dotmatrix
Remove unused map
Bring back Y vim map
Better mappings for splitjoin.vim

gJ and gK (mnemonic is the directionality of up and down)

For more information, within VIM:

    :help splitjoin
Slightly more sensible history limit

On some machines, a large scrollback buffer can affect performance
Merge pull request #1 from hashrocket/master

Update Dotmatix