Finish the regression fix in gh-4533

Make SearchSortedOp always return int64 as I'm not able to always figure out what is the output dtype.

In particular, in Python 32bit, it don't return int64, but if I make
it return intN where N is the python bit version, it also don't work.

remove redundant container checking.

The container is checked not None for twice

Better error related to gh-3376

Fix gh-4530, we can't have 2 opt with the same tag

Port local_assert_no_cpu_op to the new back-end

Add an include of gpuarray/buffer.h for future work.

update doc version to 0.9 dev

Add dev doc switcher

d3viz: fix escaping of dot graph

Fix nanguardmode with slices

Scan reintroduced

Don't use march flags in cutils to help don't have the architecture m…

Fix for #4514

Support -std=c++11 as flag to nvcc

Corrected contradictions in sparse doc

d3viz improvements for Python 3

conda provides pydot-ng neither for 2.6 nor for 3.3

adding variable name in error messages raised by calling a function

Fix a test regression when we moved the new back-end

Gpu opt

Version switcher construction in ajax to avoid setting html before version info is obtained from server