base/deploy: support both archive and git deployment

Related to tsuru/tsuru#458.
python/deploy: use the new deployment scheme

* sourcing base/deploy instead of calling it
* base/deploy will run the proper shifts :)
base/deploy: export environment variables after shifting params
python/deploy: remove call to export $@

base/deploy will do it.

Related to tsuru/tsuru#458.
all: update all deploy hooks

Closes tsuru/tsuru#458, finally!