Added Handler to install Virtualenv using Virtualenvwrapper.
Added Handler to install python-packages using virtualenvwrapper.
Renamed LGP to Global because class can be used for remote systems, too.
In this case Fabric will manage the connection.
Added a Handler to install a project using Virtuanv-Wrapper.
Renamed os to os_key to advoid nameproblems
BugFix: Fixed not found commands for using virtualenvwrapper.
BugFix: Added missing cd statement to go into venv-directory.