Fix documentation generation errors/warnings.

doc/hpcs2011_tutorial/introduction.txt

@@ -36,7 +36,7 @@ Why you can rely on Theano:
 - Used by everyone in our lab (\textasciitilde 30 people)
 - Deep Learning Tutorials
 - Unofficial RPMs for Mandriva
-- Downloads (June 8 2011, since last January): Pypi 780, MLOSS: 483, Assembla (``bleeding edge'' repository): unknown
+- Downloads (June 8 2011, since last January): Pypi 780, MLOSS: 483, Assembla (`bleeding edge` repository): unknown
 
 Why scripting for GPUs ?
 ------------------------

doc/sandbox/broadcasting.txt

 .. _sandbox_broadcasting:
 
+============
+Broadcasting
+============
+
 The following may go either in:
 a) numpy refresher.
 b) more details of broadcasting in the types section.

doc/sandbox/elemwise_compiler.txt

 .. _sandbox_elemwise:
 
+=================
+Elemwise compiler
+=================
+
 '''Stale specification page.  Upgrade this to provide useful developer doc. 2008.09.04'''
 == Definitions ==
 

doc/sandbox/functional.txt

 
+==========
+Functional
+==========
+
 Want to know about Theano's `function design
 <http://groups.google.com/group/theano-dev/browse_thread/thread/fd4c6947d8a20510>`?

doc/sandbox/hosting.txt

+==============
+Hosting Theano
+==============
+
 '''Historical Interest.  This has been addressed for now.  20080904'''
 
 There are several [http://en.wikipedia.org/wiki/Comparison_of_free_software_hosting_facilities project hosting services] online, but none is perfect for theano.

doc/sandbox/interactive_debugger.txt

+====================
+Interactive Debugger
+====================
+
 '''Seed of discussion for what an interactive debugging tool might look like. 2009.03.27.'''
 
 == Interactive debugger ( #352 ) ==

doc/sandbox/max_gotcha.txt

 .. _sandbox_maxgotcha:
 
+==========
+Max Gotcha
+==========
+
 Guillaume and I just found a bug in some experiment code that was
 basically caused by confusing semantics of max().  The same sort of
 thing applies to min.  This is an FYI email to help others on the list

doc/sandbox/performance.txt

 
+===========
+Performance
+===========
 
 Theano uses several tricks to obtain good performance:
  * common sub-expression elimination

doc/sandbox/randomnumbers.txt

 .. sandbox_randnb:
 
+==============
+Random Numbers
+==============
+
 ''' This has been implemented (#182). 20090327.'''
 
 = Random Numbers =

doc/sandbox/rethinkccodegen.txt

 '''An open proposal.  This is still relevant. 20080904'''
 
+======================
+New C code generation?
+======================
+
 == Issues ==
 
 There are several issues with the current way C code is generated:

doc/sandbox/software.txt

+===============
+Others software
+===============
+
 Other software to look at and maybe recommend to users:
 
 * [http://www.pytables.org/moin PyTables] - This is looking really