#14 Defined commands conflict with my macros

[Christopher Dembia]

I've defined from very brief macros for my own use, things like \ul to be a unit vector l-hat. It seems that the code for trackchanges also defines very brief macros/commands. Perhaps the author of trackchanges can avoid conflicts such as these by using longer names for macros/commands to avoid conflicts with users.

I am so excited to use this! This is one of the only missing pieces between LaTeX and collaborative editing.