samll engine fix
Engine components sync via chans
Fmt on sources :(
new histtory tests
working variant for history server and gob enc
Merge branch 'master' of https://github.com/cgrates/cgrates
Mediator and SessionManager wait for cache to come up before starting over internal interface
CDRc communicating over internal interface with the CDRs
Tests - cdrc/RecordAsRatedCdr ratedcdr/AsRawCdrHttpForm
Tutorials config updates for rc4
Remaned to hasdata method
Merge branch 'master' into shared_balances

Conflicts:
	apier/v1/apier_local_test.go
	apier/v1/tutfscsv_local_test.go
	cmd/cgr-engine/cgr-engine.go
	engine/storage_map.go
	engine/storage_mongo.go
	engine/storage_redis.go
got engine from master