provision/local: added some logs for setup/install.
misc: add script to generate src packages with clients name and version

Related to #83.
misc/clients-src: use git archive instead of tar
misc: uploading the source in the script

Related to #83.
cmd: update link to client installation in error message
docs/install: starting to write new page for client install instructions

I've already included homebrew instructions, so this commit closes #83.
Merge branch 'master' of github.com:globocom/tsuru into targets
docs/install/clients: instructions for pre-built binaries
docs/install/client: add instructions for installing from source
Merge branch 'master' of github.com:globocom/tsuru into targets
target-add checking if target already exists
cmd: move commands

cmd/tsuru -> cmd/tsuru-base (package tsuru)
cmd/tsuru/ops -> cmd/tsuru-admin (package main)
cmd/tsuru/developer -> cmd/tsuru (package main)
cmd: fix test
Merge branch 'master' of github.com:globocom/tsuru into targets
New command: target-list
New command: target-list (gofmt)