Retiring screen_helper.

Moved alias functions out of .bash_alias
Clean up git aliases
Add function to find an open port

* Find an available TCP port starting at the argument provided.  Works
  for BSD or Linux
Merge conflict .bash.d/utils.sh
Add some bash util functions

* Add stdin_or_first which is a function that will perform a `read` on
  stdin if the first argument is missing OR the first argument is '-'
* Move some functions out of .bash_aliases and into utils.sh where they
  belong.
set a dumb prompt for dumb terminals

* in particular, no more fighting emacs/tramp prompt regexen
Touch up some rails aliases
Add another binding for choose-session...

for use in nested sessions
Cross-platformitze emacs aliases
Add tmux binding to save scrollback to a file
Moved ruby rc files around

* Granola is delicious
* Snakes still on plane.
* Make chickens fire lasers