Usage: groovy docco.groovy [options] files
Options:
-c,--css <file> use a custom css file
-e,--extension <ext> assume a file extension for all inputs
-h,--help display help for command
-L,--languages <file> use a custom languages.json
-l,--layout <name> choose a layout (parallel, linear or classic)
-m,--marked <file> use custom marked options
-o,--output <path> output to a given folder
-t,--template <file> use a custom .jst template
-V,--version output the version number