Use BUILDR_NOTIFY env variable for notifications and make notify() available to Buildfiles
Use BUILDR_NOTIFY env variable for notifications and make notify() available to Buildfiles

git-svn-id: f481de8ecb0d1e2ade8c586a5c716a32a1f3e8c1@684608 13f79535-47bb-0310-9956-ffa450edef68

stewi2/buildr,jpcaruana/buildr,ittayd/buildr,apache/buildr,liamchristopher/buildr,liamchristopher/buildr,assaf/buildr,mariusk/buildr-kawa,jpcaruana/buildr,mariusk/buildr-kawa,atoulme/buildr,apache/buildr,atoulme/buildr,stewi2/buildr,assaf/buildr,jpcaruana/buildr,stewi2/buildr,apache/buildr,ittayd/buildr,mariusk/buildr-kawa,liamchristopher/buildr,assaf/buildr,stewi2/buildr,atoulme/buildr,apache/buildr,liamchristopher/buildr,ittayd/buildr,jpcaruana/buildr