v0.0.1.21

-.plexignore files are now used. This can be enabled/disabled in the
prefs. Fixes issue #51
-Clicking on and error message will now correctly reset the program and
return to the main menu.
-Option to scan all extensions except ignored is now a checkbox.
-Moved listTree() to just below scanFiles() for easier readability.
Merge pull request #52 from srazer/master

v0.0.1.21