[#56041502] Added some initial project files
[#56041502] Added JSON processor
[#56041502] request API for handling POST and GET
[#56041502] Added tags method to Mustache::Template
[#56041502] added user_input_from_selection method
[#56041502] colorized messages on console
[#56041502] added label printer selection
added a recursive merge function to Hash
fix tag method of Mustache template
added the missing steps to print a label

- choose a template,
- fill in the template, header and footer
- print the filled label
correct the TODO
removed debugger
Fixed the failing specs
returning correct user_input after an invalid value given
changed message printing to the screen
In case of connection refused ask the rootURL again
added possibility to choose another template
Merge pull request #1 from ke4/56041502_print_label_on_a_label_printer

56041502 print label on a label printer