Adding git lgc and lgac with committer name

These are variants of lg and lag, but with the
date and commuter information displayed in a 
new line under the subject.
Adding ql function for quicklook
Including full commit message git lgc and lgac
Adding rust to brew install list
Upgrade setuptools and pip on pip.sh run
Adding djvu2pdf to brew install list
Adding ffmpeg to brew install list
Removing references to sudo in brew.sh

sudo shouldn't be used here, and these were already commented out.
Removing altogether.
Better description for brew.sh