cmd/tsr: version 0.3.7
docs/releases: changelog for tsr 0.3.2
docs/config: fix copy and paste error

Sorry about that :S
docs/releases: improve release note for 0.3.2
docs/releases: changelog for tsr 0.3.3
docs/releases: add changelog for tsr 0.3.4
docs/releases: changelog for tsr 0.3.5
docs/releases: add changelog for tsr 0.3.6
docs/releases: changelog for tsr 0.3.7
cmd/tsuru: bump to 0.8.9
api: require tsuru client 0.8.9