Add Android Studio integration

[Manishearth]

https://github.com/Manishearth/HandWave/tree/androidstudio

This code works on android studio

[greenspand]

Hi, I just have to change the OpenCv compile path to my own right? Then it should work?

[prasanthloka]

what changes i have to do to android.mk file in touchfree library to resolve opencv2 directory not found error?