ignore graphics output dirs
updated authors
updated readme
basic gradle build works
ignore build dir
upgraded and fixed gradle setup
minor fixes following Android Studio advices
convert char sequences to string only when needed
application context might be null, apparently
bundle might be null
simplified getting address from device list activity
removed pointless comments, methods, and revised log levels
added android studio cheat sheet
auto-reformat code
ignore tmp
updated javadoc and removed pointless comments
updated todo
switched to minSdkVersion14
reformat layout files
reformat other xml