use knutin's syslog fork from the wooga account
allow setting the hostname field of the syslog messages

default to the system's hostname as per inet:gethostname/0
Pin to lager version 1.2.0
Include location in message sent to syslog
Merge remote-tracking branch 'cavl/master'

Conflicts:
	rebar.config
	src/lager_syslog_backend.erl
Adding a .edts file.