Lock down external libraries

[tholok97]

[tholok97]

Going to built-in camera app for taking pictures. Tried out https://github.com/CameraKit/camerakit-android, but it didn't act like I wanted to, and the docs were not very good.

Still undecided: how to interface with Github API and how to compress images

[tholok97]

Locked down org.eclipse.egit.github.core as the library of choice for interfacing with Github API.

Still undecided: how to compress images