command line parsing, add -c and -e

command line parsing, -c for overriding .pronsolerc filename/location, -e for commands from command line

Example M105 and M84 custom buttons

file path saving in settings

Save pronterface changes into settings, fix not taking feedrate spinners into account

Fixes for breaking movements, update pronterface fields based on settings too

"set" command to store persistent variables for preferences

Added blurb for Fedora - tested on Fedora 15, x86_64

Specify install order in readme

Macro persistence