Fix various bugs which caused crashed and incorrect behaviour.

Fix crash when auto-discovered menu items contains characters outside
ASCII range.
Fix issue when list box item Draw function called without valid item
data.
Update to VS2013.
Fix shortcuts not executing due to lack of item.command initialisation.
Fix crash when item not found in list for incrementing count.
Fix determination of path for loading application configuration files.
Fix typo in devenv shortcuts.
Change default shortcut to Win + A

The Win + Q shortcut is now a standard windows shortcut combination (as
of Windows 8).
Update version to 0.3.0 for release.
Update release script to create releases in new Releases folder.
Delete release directory after release.
V0.3.0