Add fail_on_warning support for LFE
Add fail_on_warning support for LFE

GabrielNicolasAvellaneda/rebar,bsmr-erlang/rebar,norton/rebar,zugolosian/rebar3,beni55/rebar-1,cloudant/couchdb-rebar,cloudant/couchdb-rebar,bsmr-erlang/rebar,syl20bnr/rebar,choptastic/rebar,thomasbhatia/rebar,lrascao/rebar,beni55/rebar,jacktang/rebar,syl20bnr/rebar,dcarastan/rebar,paulo-ferraz-oliveira/rebar,lrascao/rebar3,dcarastan/rebar,GabrielNicolasAvellaneda/rebar,norton/rebar,RubberCthulhu/rebar,benoitc/rebar3,basho/rebar,processone/rebar3,norton/rebar,platinumthinker/rebar,erlang/rebar3,blt/rebar3,rebar/rebar,wcy123/rebar,basho/rebar,fauxsoup/rebar3,lrascao/rebar,apache/couchdb-rebar,fabiankrol/rebar3,CMoH/rebar,matwey/rebar,RubberCthulhu/rebar,fauxsoup/rebar3,GabrielNicolasAvellaneda/rebar,scatterbrain/rebar,lpgauth/rebar,oubiwann/rebar,project-fifo/rebar3,matwey/rebar,choptastic/rebar,fabiankrol/rebar3,beni55/rebar-1,heroku/rebar,shkumagai/rebar,macintux/rebar,blt/rebar3,bsmr-erlang/rebar,processone/rebar3,djnym/rebar3,macintux/rebar,lrascao/rebar,heroku/rebar,deadok22/rebar,norton/rebar3,rebar/rebar,linearregression/rebar3,K2InformaticsGmbH/rebar,csyangchen/rebar,jacktang/rebar,shkumagai/rebar,platinumthinker/rebar,paulo-ferraz-oliveira/rebar,syl20bnr/rebar,matwey/rebar,matwey/rebar,beni55/rebar,ferd/rebar3,lrascao/rebar,oubiwann/rebar,paulo-ferraz-oliveira/rebar,SiDen/rebar,rebar/rebar3,surik/rebar3,evnix/rebar,lpgauth/rebar,jbalint/rebar3,surik/rebar3,lrascao/rebar,sile/rebar3,scatterbrain/rebar,SiDen/rebar,evnix/rebar,csyangchen/rebar,CMoH/rebar,shkumagai/rebar,saleyn/rebar3,platinumthinker/rebar,kellymclaughlin/rebar3,project-fifo/rebar3,bsmr-erlang/rebar,K2InformaticsGmbH/rebar,rebar/rebar3,thomasbhatia/rebar,zugolosian/rebar3,choptastic/rebar,CMoH/rebar,walrusVision/rebar3,matwey/rebar,apache/couchdb-rebar,apache/couchdb-rebar,tsloughter/rebar3,macintux/rebar,walrusVision/rebar3,vladdu/rebar3,evnix/rebar,thomasbhatia/rebar,K2InformaticsGmbH/rebar,beni55/rebar,K2InformaticsGmbH/rebar,lpgauth/rebar,scatterbrain/rebar,csyangchen/rebar,dcarastan/rebar,norton/rebar,oubiwann/rebar,jacktang/rebar,wcy123/rebar,jbalint/rebar3,cloudant/couchdb-rebar,linearregression/rebar3,K2InformaticsGmbH/rebar,benoitc/rebar3,sile/rebar3,fishcakez/rebar3,rebar/rebar,SiDen/rebar,deadok22/rebar