Automatically build key portions of AppImageKit

- Build only the portion necessary for creating Ember AppImages
- Use the resulting AppImageKit components to create the Ember AppImage
- This will remove the requirement to install/compile AppImageKit manually
- Minor cleanup/adjustment of existing AppImage code
Don't exit if misbehaving libraries are not found

- When creating an AppImage, certain libraries must be removed
- The script will currently exit when it fails to delete such a library
- The script should not exit if such a library was never present
Merge branch 'master' of git://github.com/olekw/hammer