bash-completion: add missing options and variables
bash-completion: add missing options and variables

- add missing short and long options
- add tests=, target_dir=, overlay_vars=

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