Lock normal inputs when enabled.
Refactor: new Settings and ControlAxis classes

Created the ControlAxis class to handle key inputs for each axis.
Changed the way control movement is calculated.

Movement is now based on the time since the key was pressed down. It
squares the time to make it move slowly at first, and speed up as the
key is held down longer.
Updated TacLib.
Updated for KSP 0.25
Added setting the values to current control input

Useful for settings the value to the current control input being done
by SAS. Thanks to Extended Trim:
http://forum.kerbalspaceprogram.com/threads/90825
Bumped version number to 0.2