Checks for operation when the 'root' scene is selected

* SceneManager - Add checks for operation when the 'root' scene is
selected
   - load OAR - Add info message and prompt to continue.
   - save OAR - Require change to a named region
   - reset, remove, restart (runCommand) - Add info message and prompt
to continue
Rework some LSL_Type comparisons

Rework LSL_Types operator ==(Vector3 lhs, Vector3 rhs) and
Equals(object o) to return an intelligent equality state
   - Currently set to be equal if like values differ by less than
0.00001 (This may need to be revised)

* Rework LSL_Type operator LSLFloat operators ==, != as per above
Console command cleanup

* Added console info output if entered command has not been recognised
* Changed a bunch of destructive command prompts to default to 'no'
instead of 'yes'