doc additions, docstring typo fixes, cross section processing scripts

doc/installation.rst

@@ -1,5 +1,5 @@
 Installation
--------------
+============
 
 SaltProc has the following dependencies:
 
@@ -42,3 +42,41 @@ Then run the following commands from the directory above cloned repository:
    python setup.py install --user
 
 Please let us know if you run into trouble.
+
+Cross Section Configuration
+---------------------------
+SaltProc can use any cross section library that Serpent can. See `this page on the Serpent wiki`_ for information on how to configure the libraries. 
+
+.. _this page on the Serpent wiki: https://serpent.vtt.fi/mediawiki/index.php/Installing_and_running_Serpent#Setting_up_the_data_libraries
+
+Testing
+-------
+The SaltProc test suite has two types of tests: unit tests and regression tests.
+The unit tests check that the individual functions and classes of the ``saltproc``
+module return the correct type of variables and correct values, where applicable. 
+The regression tests run a full SaltProc simulation and check the final result
+with a precalculated result. 
+The integration tests require the `JEFF 3.1.2 cross section library`_ as well
+as neutron induces and spontaneous fission product yield data from JEFF 3.3. 
+The publicly available versions of JEFF 3.1.2  cannot be used with Serpent right
+out of the box due to `Serpent's notation for isomeric states`_. The scripts in
+``scripts/xsdata`` download all necessary libraries and perform all the necessary processing on them for use in Serpent 2.
+We recommend using them for your convenience. 
+See the `README`_ for more information.
+
+.. _Serpent's notation for isomeric states: https://serpent.vtt.fi/mediawiki/index.php/Installing_and_running_Serpent#Setting_up_the_data_libraries
+.. _JEFF 3.1.2 cross section library: https://www.oecd-nea.org/dbforms/data/eva/evatapes/jeff_31/JEFF312/
+.. _README: https://github.com/arfc/saltproc/blob/master/scripts/README.md
+
+To run the tests, execute:
+
+.. code-block:: bash
+
+   pytest saltproc/
+
+from the root directory of SaltProc. If you just want to run the unit tests, execute
+
+.. code-block:: bash
+
+   pytest --ignore saltproc/tests/integration_tests saltproc/
+

saltproc/app.py

@@ -390,8 +390,8 @@ def run():
     # Intializing objects
     serpent = DepcodeSerpent(
         exec_path=exec_path,
-        template_fname=template_file,
-        input_fname=input_file,
+        template_path=template_file,
+        input_path=input_file,
         iter_matfile=iter_matfile,
         geo_file=geo_file,
         npop=neutron_pop,