add "add_connection" method to factor out connection logic, attempt to handle ENV:* connectors
not working yet
<application.rb> Fixed conditional in elaborate method

Was checking for starts_with? "ENV:*" which should have just been
"ENV:"

All ENV vars seem to make their way into gears which subscribe to
"ENV:*" now.

TODO: More testing
TODO: Remove "jwl-*" debugging output
<application.rb> Clean up debug output

TODO: Add doc comment to new add_connection method
<application.rb> Refactoring

Eliminated useless parameter passing to add_connection, return array
instead of modifying connections array in place

TODO: fix overrides return
<application.rb> Account for group overrides in add_connection method

Added an array to return value and tweaked code to handle