if sendsms_host is empty fill it with bearerbox_host, kannel gw
cleanup config-dist
update docs
updates SQL install script to fill new option 'sendsms_host'
Merge branch 'split-kannel-bearerbox-host-config' of https://github.com/lucastx/playSMS into lucastx-split-kannel-bearerbox-host-config

Conflicts:
	db/playsms.sql