Improve Photo Controller#526

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Cewdyn wants to merge 2 commits intoBernie-2016:developfrom

Cewdyn:issue/486/improve_photocontroller

Commits on Feb 18, 2016

Refactored the PhotoController. It now accepts images selected via non-standard file browsers. The app now also verifies the extensions of files selected this way.
Cewdyn
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Commits on Feb 19, 2016

Changed error message to be more user friendly. Also added some code to make sure the image picker works with older versions of android.
Cewdyn
committed