Add location class functions to location documentation section

Author: AdamRJensen

docs/sphinx/source/reference/location.rst

@@ -9,3 +9,23 @@ Methods for information about locations.
    :toctree: generated/
 
    location.lookup_altitude
+
+A :py:class:`~pvlib.location.Location` object may be created from the
+metadata returned by some file types.
+
+.. autosummary::
+   :toctree: generated/
+
+   location.Location.from_tmy
+   location.Location.from_epw
+
+Methods for calculating time series of certain variables for a given
+location.
+
+.. autosummary::
+   :toctree: generated/
+
+   location.Location.get_airmass
+   location.Location.get_solarposition
+   location.Location.get_sun_rise_set_transit
+   location.Location.get_clearsky