Delete TestedDevices.md

moved to github wiki.
Delete javax.sound.midi.md

moved to github wiki.
Delete maven.md

moved to github wiki.
Merge branch 'hotfix/documentation'
Merge branch 'release/input_performance_tuning'
Thread correction./MIDIDriverSample/src/jp/kshoji/driver/midi/sample/MIDIDriverSingleSampleActivity.java
build target reversed to android-12
Merge branch 'hotfix/fix_for_pull_request_11' into develop