Peter M. Groen / CLI11

Fix #23: Respect fallthrough_ in _valid_subcommand

Moving to Trusty for builds

_valid_subcommand checks whether its argument appears to be a valid subcommand name or not; however, if it doesn't recognize the name, it always checks if its parent does. As described in in issue #23, this can cause incorrect behavior. To avoid this, check if fallthrough is disabled first, and do not consult the parent's known subcommands if fallthrough is disabled.

Adding enum support

* Fixes for #8, vars hidden and findPython used

* Adding compat with default python, better defaults

* Remove windows warning, use secure getenv

* Fix typo in last commit

* Fix typo in windows version

* Fix another typo in windows version

* Fixing error, dropping warn suppression

Prefix program support

Adding parse order capture