Update ubuntu doc for 13.10
Faster profiling by doing less toposort.
Add k6000 blas timming.
Do the constant folding on the new back-end gpualloc.

Add other gpualloc tests. It currently fail as ger isn't implement on
the new back-end.
Fix memory leak of MaxAndArgmax when allow_gc=False
Register constant folding in stabilize and specialize too.
It is the fgraph that is the key.
Move do_constant_folding to the right Op! Thanks AB.
Fix typo.
Fix path to class and comment class not yet implemented.
Remove import not used.
Merge pull request #1790 from nouiz/mixed

Mixed