Cython minimum version is 0.19

Resolves #302.

SConstruct

@@ -929,7 +929,7 @@ if env['VERBOSE']:
 env['python_cmd_esc'] = quoted(env['python_cmd'])
 
 # Python 2 Package Settings
-cython_min_version = LooseVersion('0.17')
+cython_min_version = LooseVersion('0.19')
 env['install_python2_action'] = ''
 if env['python_package'] == 'new':
     env['python_package'] = 'full' # Allow 'new' as a synonym for 'full'

doc/sphinx/compiling.rst

@@ -42,7 +42,7 @@ Linux
 * Checking out the source code from version control requires Git (install
   ``git``).
 
-* The minimum compatible Cython version is 0.17. If your distribution does not
+* The minimum compatible Cython version is 0.19. If your distribution does not
   contain a suitable version, you may be able to install a more recent version
   using `easy_install` or `pip`.
 
@@ -441,9 +441,8 @@ Optional Programs
 
 * `Cython <http://cython.org/>`_
 
-  * Required to build the Python module
-  * Known to work with versions 0.19 and 0.20. Expected to work with
-    versions >= 0.17.
+  * Required version >=0.19 to build the Python module
+  * Known to work with versions 0.19 and 0.20.
   * Tested with Python 2.7, 3.3, and 3.4. Expected to work with versions 2.6 and
     3.1+ as well.