[fix 49834805] Added create printable label
added print config file
[fix #49834805] Added invalid barcode handling
[fix #49834805] refactored the label printer resource

removed printable_label resource and its related
classes, too.
[fix #49834805] added print_label action
Merge pull request #19 from ke4/49834805_create_a_script_to_print_a_barcode_with_a_printer

49834805 create a script to print a barcode with a printer