2.5.1

• speed up message box by removing the malloc/free per incoming message
• added regression test framework with some initial message box tests
• add linked errors in the console for message parsing errors. This allows you to "Find last error" for messages that don't have enough args, have a bad selector, etc. You can also click the link for the relevant error in the console to find them
• add "x" and "y" methods for [draw image]
• fix a regression with [pd~]
• add Vanilla version compatibility to "About Pd"
• build fix for make light
• add more midi device slots to the Preferences dialog