[Feature Request] Add more logging

[BlackLotus]

I just filed a bug report for slow loading times of the app #221.
My first move was to try analyze it with adb and logcat, but didn't get any output. Looking at the code I found that only minimal logging was added to leaefpic in form of 4 i, 5 e, 3 wtf, 2 w and 1 d loglevel message.
Adding a few more messages could help debugging bugs and bottlenecks.