Package update so tests will run on installed version of layerstack

CHANGES.txt

@@ -1,3 +1,4 @@
+v0.3.1, 09/02/20 -- Ensure files required to run tests get installed
 v0.3.0, 09/02/20 -- Stack.load and CLI functions can look in alternate locations for Layers; ArgMode, Layer and Stack can be imported directly from layerstack; Stack.save more robust to different object types; testing and documentation improvements
 v0.2.0, 10/30/19 -- adding layerstack_stack CLI, ArgMode can be set with str, bug and documentation fixes
 v0.1.0, 05/22/18 -- initial release

layerstack/_version.py

@@ -1 +1 @@
-__version__ = '0.3.0'
+__version__ = '0.3.1'

setup.py

@@ -24,8 +24,10 @@
     description = 'Python package for assembling, sharing, and running workflows, especially those associated with modifying, running, and analyzing simulation models',
     long_description = long_description,
     package_data = {
+        '': ['LICENSE'],
         'layerstack': ['*.template'],
-        '': ['LICENSE']
+        'layerstack.tests': ['layer_library/*/layer.py',
+                             'stack_library/*.json']
     },
     install_requires=[
         'jinja2'