Blender Git Loki

* User preference to select with the left mouse button
instead of right.

This basically swaps left and right, in most window spaces
so you can choose between:
LMB: Cursor/time slider/paint - RMB: Select
or LMB: Select - RMB: Cursor/time slider/paint

Aimed at:
1. Newbies
2. 1 button mouse mac users
3. People like me who are sick of having to constantly keep putting their brains into different modes when
switching between other apps and Blender :)

Yes, the User Preferences window is a bit of a nightmare
now, a layout cleanup will be forthcoming soon...