Squashed commit of the following:

commit bed32453df56ade49c441c262cbe5b8c7298dc06
Author: Gregory Brown <gregory.t.brown@gmail.com>
Date:   Thu Jan 23 13:04:01 2014 -0500

    Wrap up stabilization sweep

commit 7fa4b662a163c306fe2f8c4b193285fda63df5ac
Author: Gregory Brown <gregory.t.brown@gmail.com>
Date:   Thu Jan 23 10:45:19 2014 -0500

    Mark entire Graphics API as stable

commit 65f612e7cb75b64ed0fa40b63eebda9b2cc1e3b9
Merge: 67c168d ee2348f
Author: Gregory Brown <gregory.t.brown@gmail.com>
Date:   Thu Jan 23 10:38:10 2014 -0500

    Merge branch 'master' of github.com:prawnpdf/prawn into stable-api-review

commit 67c168db397bd11b40af59e62adc8e2de624f548
Merge: 65a565d db02256
Author: Gregory Brown <gregory.t.brown@gmail.com>
Date:   Thu Jan 23 10:22:57 2014 -0500

    Merge branch 'master' of github.com:prawnpdf/prawn into stable-api-review

commit 65a565d2d429fe627f528898f963d500d0a6fd69
Author: Gregory Brown <gregory.t.brown@gmail.com>
Date:   Thu Jan 23 09:59:24 2014 -0500

    API stablization pass thrugh BoundingBox