Catrobat/Catroid — pull request #19 by mfellner (2012-07-19 16:30:17+00:00)
Title: Project compatibility and opening local project files.

These changes fix [issue 180](http://code.google.com/p/catroid/issues/detail?id=180&colspec=ID%20Type%20Status%20Priority%20Owner%20Summary) and implement the new feature to open .catroid files on the local file system. Two minor improvements are:
* Proper singleton implementation in *ProjectManager*
* '*m*' prefix for private members in *ProjectManager*

Unfortunately, *Project* is a big changeset because the auto-formatter replaced all spaces with tabs. Tests will be added later with additional commits.