Added $dcapi object to %options for ease of reference.
Print messages when API requests are not successful.
Check and set default value for regex parameters for different commands.
Added more list commands

Added commands for listing parameter sets, activations and environments,
in addition to installed sketches.
Added 'activate' command

This command (previously called "configure") associates an installed
sketch with one or more parameter sets, plus an environment. Instead of
a defined environment name, a class expression can be provided and a new
environment will be defined for it.
Added 'generate' and 'deploy' commands.

For now both are the same - the type of runfile generate (standalone or
non-standalone) is controlled by the API configuration.