Updated git root aliases in git and shell configs

Added alias to git so that `git root` prints the path to the root
directory.

Changed shell alias from 'git-root' to 'cdgr' to cd to the git
root directory.
Removed SBT eclipse and IDEA plugins
Added git 'fa' alias to fetch from all remotes
Revert "Updated SBT config to let Ctrl-c..."

This reverts commit cb7d21a57cb9774e043049ba7f97c8455fe82042.
Updated tmux config to remove C-a last pane bind

The C-a last pane bind was redundant; the ; (semicolon) bind does the
same thing.
Modified git log/graph output color schemes
Added git alias 'noff' to force no fast-forwarding