Merge pull request #305 from MSeifert04/include_read_write_method_doc…

…string

include read and write method documentation to CCDData [skip ci]

ccdproc/ccddata.py

@@ -16,7 +16,7 @@
 from astropy.wcs import WCS
 
 
-__all__ = ['CCDData']
+__all__ = ['CCDData', 'fits_ccddata_reader', 'fits_ccddata_writer']
 
 
 class CCDData(NDDataArray):
@@ -70,6 +70,18 @@ class CCDData(NDDataArray):
         If the ``uncertainty`` or ``mask`` inputs cannot be broadcast (e.g.,
         match shape) onto ``data``.
 
+    Methods
+    -------
+    read(*args, **kwargs)
+        ``Classmethod`` to create an CCDData instance based on a ``FITS`` file.
+        This method uses :func:`fits_ccddata_reader` with the provided
+        parameters.
+    write(*args, **kwargs)
+        Writes the contents of the CCDData instance into a new ``FITS`` file.
+        This method uses :func:`fits_ccddata_writer` with the provided
+        parameters.
+
+
     Notes
     -----
     `~astropy.nddata.NDData` objects can be easily converted to a regular