Sync up develop after major rebase for rc3

readme: quick correction to build instructions

client: silence log output from go-rpc

glide: update eris/common hash

release: correct version tag and remove lingering config file

Release 0.12.0-RC3

docs: suggest corrections to initial changelog

gofmt: full sweep on develop

Bump version, but label as development version

Filled in changelog

blockchain: correct filter condition, also skumtFel, fixes #120

Feature smaller docker redux

readme updates

fix circle problems; push correct image

utilize a common docker building paradigm across the stack

update readme to route traffic to monax