removed unused code
removed invalid imports
bring amount field into focus when reseting invoice
added analytics event to refresh button
support for hitting return key instead of button click
servlet clean up
bug causing bad qr code to be rendered
reset state when starting new invoice
bug causing qr code to change once invoice was paid
Merge branch 'feature/tweakn' into develop
0.4 -> 0.5
Merge branch 'release/0.5'