Remember Locations & detect changes plugin editor.

As I can see we didn't interfere with each other changes you made yesterday in your commits.
Changes commit in thos merge:
+Remember distinct locations for open binary and plugins.
+Detect changes not saved in plugin editor and warns the user.
+Delete "ASB:" marks from code comments (git does it better).
+Documenting some enums with Doxygen.
+Sorted members in Doxygen.
+Update 'About' information.
You've added tab there instead of space :D