put virtualenv activation during build in comment. That means that for the moment the build machine must be provisionned beforehand, or ansible must be available globally
- Allow installation of drush 5.
- with pear? -> hard dependency on a puppet pear module?
- from tarball? -> for any version of drush. example42/puppi may help?
- Fix version management.
- Alias 7 to master / dev-master