Add tmux.conf.local
Merge pull request #156 from slam/tmux_local

Add tmux.conf.local
Don't recursively map all the time

If users remap keys, the behaviour of the things set up in vimrc may change.

An example of this is the common remapping to switch `;` and `:`, which will
cause all of the keyboard shortcuts involving `:` to fail. Switching the *map
statements to their *noremap counterparts fixes this problem, by using the
original meanings.
Merge pull request #158 from ElliottH/mapping

Don't recursively map all the time
Don't copy the contents of an overwritten selection.
Document select-paste vim config.
Clarify the visual selection overwrite docs.
Merge pull request #161 from square/donovan/dont-copy-replaced-selections

Don't copy the contents of an overwritten selection.
Merge branch 'square_master' into my_custom