Change match parent to wrap content of the image layout (res)
Add ImageView holder to skip findViewById (Cards)
Remove margin image layout (res)
Fix Card bug that had influence on the image ratio (Cards)
Reorder variables (Cards)
Rename wrapWidth method with wrapImage (Cards)
Update settings to use PreferenceFragment

...and also make the settings layout more compliant to the design guide,
which in our case means: no sub screens, only categories.
Merge pull request #279 from ratan12/Fix_card

Fix Image ratio
Merge pull request #280 from d-sko/preferences_update

Update settings to use PreferenceFragment