Extract Gambas help comments from source files.

Usage: gbh3 [options] [<sources>]

Options:
  -r --root <root>                 gives the Gambas installation directory
  -c --component <component>       generate help directly in a component '*.help' file
  -V --version                     display version
  -L --license                     display license
  -h --help                        display this help

If <sources> contains directories, they are searched recursively for '*.c'
and '*.cpp' files. If <sources> is not specified, the current directory
is searched.

The extracted help is printed on the standard output, unless the '-c' 
option is specified.