Bump doc min requirement to Python 3.4

doc/dev_start_guide.txt

@@ -55,8 +55,8 @@ Requirements for Quality Contributions
 
 * All the code should be properly tested. 
 
-* The code should be compatible with Python 2.7 and above, as well as Python
-  3.3 and above (using `six` if needed).
+* The code should be compatible with Python 2.7 and above, as well as
+  Python 3.4 and above (using `six` if needed).
 
 * All the code should respect the 
   `PEP8 Code Style Guide <http://www.python.org/dev/peps/pep-0008>`_.

doc/faq.txt

@@ -8,7 +8,8 @@ Frequently Asked Questions
 
 Does Theano support Python 3?
 ------------------------------
-We support both Python 2 >= 2.7 and Python 3 >= 3.3.
+
+We support both Python 2 >= 2.7 and Python 3 >= 3.4.
 
 Output slight numerical difference
 ----------------------------------

doc/requirements.inc

@@ -14,10 +14,10 @@ Requirements
 .. _pycuda: https://mathema.tician.de/software/pycuda/
 .. _skcuda: http://scikit-cuda.readthedocs.io/en/latest/
 
-    Python_ == 2.7* or ( >= 3.3 and < 3.6 )
+    Python_ == 2.7* or ( >= 3.4 and < 3.6 )
         |PythonDistRecommended|. Python 2.4 was supported up to and including the
         release 0.6. Python 2.6 was supported up to and including the
-        release 0.8.2. Python 3 is supported past the 3.3 release.
+        release 0.8.2. Python 3.3 was supported up to and including release 0.9.
 
     `NumPy <http://numpy.scipy.org/>`_ >= 1.9.1 <= 1.12
         Earlier versions could work, but we don’t test it.

setup.py

@@ -33,7 +33,6 @@ Operating System :: MacOS
 Programming Language :: Python :: 2
 Programming Language :: Python :: 2.7
 Programming Language :: Python :: 3
-Programming Language :: Python :: 3.3
 Programming Language :: Python :: 3.4
 Programming Language :: Python :: 3.5
 """