ArmaSense settings file to allow for additional commands

[nevadascout]

If the user creates a settings.as file and puts it into the Dash project folder, any commands listed in there can then be added to the ArmaSense menu as suggested items.

For example, the CBA macros: https://dev.withsix.com/docs/cba/index/Macros.html

The settings file should allow setting the description and syntax as described in #81