perferenceheader bug

[fredgrott]

every attr has to have a format field in preferenceheader in values files..

otherwise you get aapt erros..its hanging on title and icon..so i am putting string format for title and integer format for icon.

[jromero]

This issue was resolved in the dev branch. Alternatively you can checkout my fork as I will try to keep master up-to-date: https://github.com/jromero/UnifiedPreference