Default behavior for ghost clicking changed so they no longer examine everything on click by default

Changes default behavior for ghost inquisitiveness to not examine everything when you click on it. Toggle inquisitiveness still exists to enable or disable whether clicking on stuff auto-examines. 

Shift-click obviously still always works to examine stuff irrespective of ghost inquisitiveness.
Merge pull request #525 from errorage/patch-6

Default click behavior for ghost changed to not examine everything