Barcode Scanner often (always?) add a Return after a scanned barcode. Added a flag that allows to skip the next Return keypress, if it's the next key after the stop character.
Added the ability to always listen to input and turn this mode on and off. This allows to look for scancodes without start and stop keys. The buffered code is send to the server when an "Enter" or stopKey is detected. From non-char keys only "Enter" is remapped now, because remapping the other keys introduced various problems and basically disabled all browser functions like, for example, F5.
Merge pull request #5 from ssindelar/7.1

Added additional mode which allows to scan barcodes without start/end key.