+ Added 'omg env' command to show relevant environment info. (blowmage)
+ Removed env info from normal repo switch handling. (blowmage)
+ Added OMG_NAME variable to make it easier to program. (blowmage)
+ Expanded help and made prettier.

[git-p4: depot-paths = "//src/ohmygems/dev/": change = 9540]
prepped for release
[git-p4: depot-paths = "//src/ohmygems/dev/": change = 9541]