Allow setting local_host
Make send_response and send_request take keyword parameter arguments
Move dialog logic to a separate class
Fixes from testing
Merge branch 'keywords_api' into test_branch

Conflicts:
	lib/call.rb
	lib/endpoint.rb
Further fixes from testing
Merge remote-tracking branch 'origin/master' into keywords_and_dialog_testing

Conflicts:
	lib/endpoint.rb
Merge pull request #9 from rkday/keywords_and_dialog_testing

Switch main API methods to take keyword params; improve dialog handling