Partially implemented unlink, symlinking now sets permissions

Delete database tool keeps backup (no duh...)
Simplified imports (I think)
Removed some unused csv stuff
Consistent calling of windll.kernel32
Added database delete to file menu
Makes database and then backsup
Added button to add an existing link to the database (unimplemented)
Began conversion to os.path (amazing module)
Moved symlink and unlink functions into main gui class to prepare for
changing some prints to dialog boxes.
Made duplicate code that gets selection from ObjectListView into own
function
Symlinks now invalid folders to link
Symlinking sets permissions to allow moving
Lots of nice exception handling that attempts to restore old state upon
a failure
Implemented IsSymlink function for Windows in Python 2.7 (WHY CAN'T
WXPYTHON BE PYTHON 3?!?)