Add: role nodejs

ansible-galaxy init roles/nodejs
Rem: useless files
Mod: README, meta and define the license
Mod: the playbook nodejs installs nodejs \o/
Mod: the role nodejs installs npm
Mod: install nodejs on all servers
Merge branch 'devel/role-nodejs'
Add: role hipache

ansible-galaxy init roles/hipache
Rem: useless files
Mod: README, meta and define the license
Mod: the playbook hipache installs hipache \o/
Add: install hipache on all servers
Merge branch 'devel/role-hipache'
Add: role python

ansible-galaxy init roles/python
Rem: useless files
Mod: README, meta and define the license
Mod: the playbook python installs python \o/
Add: install python on all servers
Merge branch 'devel/python'
Add: dependency on python