4.3: modified IconCreator to use IM instead of PIL by default, if it is installed
4.3: updated IconCreator to better handle icon creation and exceptions, specifically in mac os settings
4.3: improved IconCreator; now prefers imagemagick on mac os as well
Merge pull request #22 from southpawtech/4.3-thumbnail

4.3: modified IconCreator to use IM instead of PIL by default, if it is ...