Fixed: Missing use statement
Removed: erroneous balance calculation rule and bad echo statement
Fixed: bad caching in relation to block_height values.
Added: 'balance query' message on purchase page
Update to 0.75
Update README.md
Fixed: Maximum transaction no longer crashes bill scanner
Changed 'escrowed' requirement to 'stacking'
Fixed: LinuxSerial now sets the tty to raw mode
Fixed: bill scanner now only credits stacked bills
Fixed: status byte now correctly interpreted when control bits are set
Fixed: removed double ord() on some values
Removed: debugging output
Fixed: camera css was broken in prior css commit
Fixed: langauge selector now functions properly