Alpha 7 Changes

- Removed dialog asking to create the new folder when creating a new
project
- Creating a new project will no longer overwrite main.agc if it already
exists in the project folder
-Fixed Mac IDE not liking spaces in its path
-Attempted to target MacOS 10.7, unable to test
-Fixed message window not remembering its height in some cases
- Fixed "open in new window" menu option not working
- Added IDE option to remember open projects when closing
- Added displaying of function parameters on typing a comma in addition
to an open bracket