US9: command line tool

[marcbaechinger]

• file can be build with the same options as in web app
• a project can be built with the same options as in web app
• output prints to stdo by default
• an -f option can determine an output file
• an -c option can determine an configuration file
• cli options override configuration file settings

[marcbaechinger]

repriorized to v2

[marcbaechinger]

implemented and commited: see wiki