Include tests with distribution

I now include the test subdirectories with the installation.
This fixes Github #49.

Author: rlabbe

MANIFEST.in

@@ -1,3 +1,11 @@
 include filterpy/changelog.txt
 include LICENSE
-recursive-include tests *.py
+recursive-include filterpy/common/tests *.py
+recursive-include filterpy/discrete_bayes/tests *.py
+recursive-include filterpy/gh/tests *.py
+recursive-include filterpy/hinfinity/tests *.py
+recursive-include filterpy/kalman/tests *.py
+recursive-include filterpy/leastsq/tests *.py
+recursive-include filterpy/memory/tests *.py
+recursive-include filterpy/monte_carlo/tests *.py
+recursive-include filterpy/stats/tests *.py

filterpy/__init__.py

@@ -14,4 +14,4 @@
 for more information.
 """
 
-__version__ = "1.3"
+__version__ = "1.3.1"

setup.py

@@ -54,14 +54,16 @@
         # Specify the Python versions you support here. In particular, ensure
         # that you indicate whether you support Python 2, Python 3 or both.
         'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.2',
-        'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
-        'Programming Language :: Python :: 3.6'
+        'Programming Language :: Python :: 3.6',
+        
+        'Operating System :: Microsoft :: Windows',
+        'Operating System :: POSIX',
+        'Operating System :: Unix',
+        'Operating System :: MacOS'
     ],
 
     # What does your project relate to?
@@ -81,7 +83,7 @@
     # installed, specify them here.  If using Python 2.6 or less, then these
     # have to be included in MANIFEST.in as well.
     package_data={
-        'filterpy': ['README.rst', 'filterpy/changelog.txt', 'LICENSE'],
+        'filterpy': ['README.rst', 'filterpy/changelog.txt', 'LICENSE', 'filterpy/kalman/tests/*.py'],
     },
 
     # Although 'package_data' is the preferred approach, in some case you may