Update to 1.2.5.

Update LICENSE

Changes for v1.2.4:

• New MIDI shortcuts TAB
• Fixes for building using Qt v.5.x.
• Passthrough of more MIDI control events
• New Edit/Insert chord icon
• Some minor GUI changes
• The configuration is now fully automatic. No more need to "apply" the configuration.

Changes for v1.2.5:

• Reworked BPM generator
• Fixed a deadlock situation

Submitted by: maintainer (via e-mail)