Fast Travel is a mod that allows you to travel to different locations that you previously defined.
Curse: http://minecraft.curseforge.com/projects/fast-travel
Required mod: K4Lib
This mod is released under the MMPLv2
Yes, you can make pull requests for new variables, if implemented properly i'll merge them.
Please report bugs to the issues page. Put crashlogs in a pastebin or gist!