Execute init tasks for all components (virtualenv, pip).

def init():
    """Execute init tasks for all components (virtualenv, pip)."""
    print(yellow("# Setting up development environment...\n", True))
    virtualenv.init()
    virtualenv.update()
    print(green("\n# DONE.", True))
    print(green("Type ") + green("activate", True) + green(" to enable your dev virtual environment."))