removed unused default screens
add default push setting, enabled credential caching.
la lists all, including . and ..
pgrep filters grep out of output. removed colordiff alias since i prefer vimdiff.
dont add gsutil to PATH, and added termcap for color in man pages.
move PS1 generation and assignment to end. added function to print colors.
add format to clock. use volume widget. use correct ethernet iterface name. keymappings for volume up, down, and mute. set screen off timeout.
use vundle to manage most plugins. explicitly set shiftwidth, tabstop, and expandtab for all files. some tricks from Damian Conway.
post merge fixes. divergence seesm to be from changes made for server and laptop separately.