changes in interaction with pip.py

project.py

# somewhere in WebProject
    @task_mehtod
    def install_r(self, what=None, options='', restart=True):
        """
        Installs pip requirements listed in ``<PIP_REQUIREMENTS_PATH>/<file>.txt`` file
        and reloads all apps of the project, if specified.
        """
        pip.install_r(what, options)
        if restart:
            for app in self.apps:
                app.restart()

    @task_method
    def update_r(self, what=None, options='', restart=True):
        """
        Updates pip requirements listed in ``<PIP_REQUIREMENTS_PATH>/<file>.txt`` file
        and reloads all apps of the project, if specified.
        """
        pip.update_r(what, options)
        if restart:
            for app in self.apps:
                app.restart()