As there's a lot of problems around development & debugging on Android
+ recently it has changed (we've Koreader for x86 arch)
+ a lot of information is split between issues
and we miss one place to sum up the knowledge that everyone might not be aware.

- I created initial version of HowTo :
https://github.com/koreader/koreader/wiki/Development-and-Debugging-on-Android

Please help writing it so new developers wouldn't have to reinvent the wheel.