Merge pull request #1 from stefanceriu/master

Merge from stefanceriu/SCXcodeMiniMap master
Add INIT and DEALLOC logs
Create show/hide menu item
Huge refactoring : now uses a custom NSScrollView subclass : SCMiniMapView
Add a show/hide menu item (under "Edit" menu)
Update "To Do" Section
- moves "navigation" code from SCTextView to SCMiniMapView
- deletes the now useless SCTextView
- fixes the "selection view" bugs
- add lazy initialization => textview and selection view are not initialized if the mini map is hidden
Moved the MiniMap show/hide menu item to the View menu and added a Ctrl+Shift+M shortcut