Zsh: retire `ttr` alias; add `t`

My most frequent tmux command is `tmux a -t c` (short for `tmux attach
-t causes`); I'd like to make it `t a -t c`.

Signed-off-by: Wincent Colaiuta <win@wincent.com>
Vim: add runtime files from gocode project

Specifically, these are the files corresponding to commit:

  https://github.com/nsf/gocode/commit/0e46b3d56609b96d2f8a0208b59c0724c71bf7c0

Signed-off-by: Wincent Colaiuta <win@wincent.com>
Add customizations for Clipper

Conveniences for sending stuff to the local system clipboard via
Clipper.

Signed-off-by: Wincent Colaiuta <win@wincent.com>