Alpha Build 20160925

In this version...

• You can review your best record of each song now!

  But it is incompatible with the record database generated by the prior version, so before overwriting current version to replace the old one, please remove the old "records.dat" if it exists.

• Options to enable/disable the BGA, and the detune effect (which will detune the sound when you hit the not not accurate enough)

• When editing the key mapping, you can directly press the desired key instead of choose the key in the drop down list.