Merge pull request #159 from nouiz/doc

doc/library/sparse/index.txt

@@ -14,6 +14,8 @@ The sparse module has been used in:
 The sparse module is less mature than the tensor module.
 This documentation is also not mature.
 
+The sparse submodule is not loaded when we import theano. You must import theano.sparse to enable it.
+
 The sparse module provides two kinds of sparse tensors are supported: CSC matrices and CSR matrices.
 Operations that are implemented:
 

doc/tutorial/debug_faq.txt

@@ -17,13 +17,13 @@ Isolating the problem/Testing Theano compiler
 You can run your Theano function in a DebugMode(:ref:`using_debugmode`). This test the Theano optimizations and help to find where NaN, inf and other problem come from.
 
 
-Interactive Debugger
---------------------
+Using Test Values
+-----------------
 
 As of v.0.4.0, Theano has a new mechanism by which graphs are executed
 on-the-fly, before a theano.function is ever compiled. Since optimizations
-haven't been applied at this stage, it is easy for the user to locate the
-source of this bug. This functionality is enabled through the config flag
+haven't been applied at this stage, it is easier for the user to locate the
+source of some bug. This functionality is enabled through the config flag
 ``theano.config.compute_test_value``. Its use is best shown through the
 following example.