Blender Git Loki

Tools: add Select tool, with transform tweak on drag and no click delay.

For users that want the 2.7 LMB keymap behavior, this provides a way of
working without tools interfering. For RMB select this operator is quite
redundant with the Cursor tool, we may have to find a solution for that.

Note that we also might later add transform tweak to the transform tools,
when nothing is selected. But this is important for existing users who
preferred the existing workflow.