Moved microscoperc.yaml to microscope_settings.yaml

------------------

Microscope configuration is made persistent via a microscope runtime-config (RC) file. By default, this

file exists at ``~/.openflexure/microscoperc.yaml``, and contains basic parameters to set up the microscope.

file exists at ``~/.openflexure/microscope_settings.yaml``, and contains basic parameters to set up the microscope.

Additionally, by default, configurations for specific pieces of hardware (i.e. the Pi camera) are located

in separate "auxillary" config files, and are linked together by adding the config file's path to your main

microscope RC file. This is set up by default, as shown below:

Default microscoperc.yaml

Default microscope_settings.yaml

+++++++++++++++++++++++++

.. code-block:: yaml

The main restriction is that the plugin package must be importable using an absolute import from within the Python environment being used to load your microscope. 

Loading plugins with microscoperc.yaml

Loading plugins with microscope_settings.yaml

--------------------------------------

Both types of plugin are loaded by specifying the plugin class in your :ref:`MicroscopeRC`. In the case of a single-file plugin, specify the path to the plugin file, followed by the name of your :py:class:`openflexure_microscope.plugins.MicroscopePlugin` child class, separated by a colon. For packaged plugins, specify the absolute module name in place of the path.

For example, the plugins section of your microscoperc.yaml file may look like:

For example, the plugins section of your microscope_settings.yaml file may look like:

.. code-block:: yaml

# HANDLE THE DEFAULT CONFIGURATION FILE

HERE = os.path.abspath(os.path.dirname(__file__))

DEFAULT_CONFIG_PATH = os.path.join(HERE, 'microscoperc.default.yaml')

DEFAULT_CONFIG_PATH = os.path.join(HERE, 'microscope_settings.default.yaml')

USER_CONFIG_DIR = os.path.join(os.path.expanduser("~"), ".openflexure")  #: str: Default path of the user-config directory, containing runtime-config and calibration files. Obtained from ``os.path.join(os.path.expanduser("~"), ".openflexure")``.

USER_CONFIG_FILE = os.path.join(USER_CONFIG_DIR, "microscoperc.yaml")  #: str: Default path of the user microscoperc.yaml runtime-config file. Obtained from ``os.path.join(USER_CONFIG_DIR, "microscoperc.yaml")``

USER_CONFIG_FILE = os.path.join(USER_CONFIG_DIR, "microscope_settings.yaml")  #: str: Default path of the user microscope_settings.yaml runtime-config file. Obtained from ``os.path.join(USER_CONFIG_DIR, "microscope_settings.yaml")``

with open(DEFAULT_CONFIG_PATH, 'r') as default_rc:

    DEFAULT_CONFIG = default_rc.read()

        if 'plugins' in self.rc.config:

            self.attach_plugin_maps(self.rc.config['plugins'])

        else:

            logging.warning("No plugins specified in microscoperc.yaml. Skipping.")

            logging.warning("No plugins specified in microscope_settings.yaml. Skipping.")

    def reload_plugins(self):

        """