allow runtime setting of Recognition-Timeout

Resolved conflicts:
	lib/punchblock/translator/asterisk/component/mrcp_recog_prompt.rb

send recognition timeout setting as UniMRCP option

allowing dynamic setting of Recognition-Timeout in the MRCP messaging
with speech recognition server

Resolved conflicts:
	lib/punchblock/translator/asterisk/component/mrcp_recog_prompt.rb

add test for setting recognition-timeout header

update changelog

add spec for mrcp_recog_prompt and enforce Rayo protocol in the #validate method
Merge pull request #228 from Jared-Prime/feature/send_recognition_timeout_to_unimrcp

[Feature] Send recognition timeout to UniMRCP