Fix blas

Minor fixes

Also fixed the stack level to display the line where the function is
created.

Epd

Blas

Fix typos and enable syntax highlighting for lisp

Fix tests following usage of new exceptions.

Pep8

Test value scan fix

Add documentation to set up editors with pep8

This avoids warnings / crashes (depending on the value of the
compute_test_value config option) caused by scan's cloned variables.

Also fixed a couple small typos.

failing GpuConv unittest

Minor stuff

added new sparse ops in sanbox

PEP 8 fixes, assisted by Syntastic and flake8.