Merge pull request #5 from nicedevs/fixes

Fixes paths in the Gtk3 example and searches all prefixes for dependencies.
Update bundler to correctly work with Pango-2.32.1-patched
Prepare 0.7.1 release
Fix small error in Pango handling
Strip the compatibility information from otool output before submitting it to relative_path_map().
Prepare 0.7.3 release
Fix another typo in pango module path

Thanks to "aserranor" on Github for pointing it out.
The *correct* fix for pango modules.

Thanks to aserranor@github.com
Bring example bundle files and launchers up to date
Correct gdk-pixbuf path in the pygtk example
launcher: Update for pango changes

The newish changes to pango require a slightly different default
launcher.sh
Update all launchers to reflect new pango environment variables
Bug #698916: Update versions, fix pixbuf
Bug 698196: Fix typo
Make main-binary optional
Make the gtk-mac-bundler a direct script to not install it