Fix Issue #7 can only run rbt <cmd> from inside source dir

Upgraded to ruby 1.9.3 using rvm. This has support for require_relative, which requires files from each path's relative file. This lets us execute commands from anywhere as long as the rvm script is in our path.

modified:   actions.rb
modified:   env.rb
modified:   mover.rb
modified:   rbt
modified:   tc_all.rb

testing: rvm init /tmp/projA, rvm report /tmp/projA worked fine.
         Wish I had a version of this project to test it with.