Add protocol configuration to use it
Add check for protocol option. Refs abhinavsingh/JAXL#47
Merge remote-tracking branch 'allevo/v3.x' into ft-protocol-in-config

Conflicts:
	jaxl.php
Fix undefined index notice.

Closes abhinavsingh/JAXL#47
Merge branch 'ft-protocol-in-config' into v3.0.1_proposal