Restore skip_stages support for 'html'.
Switch from more_itertools.chunked to funcy.chunk.
Remove some old TODOs, and add a few new ones.
Actually instantiate TreeToIndex classes.
Add ES to the Vagrant box.
changed TTI -> dxr.TreeToIndex
mock slipped back into requirements.txt
CORRECT_ORDER not used
warning tests somehow slipped through
flake8!!
Subset of the old Clang Plugin needles #295

Merge branch 'clang2' into es
includes all needles except type and inheritance
Added Type utilities, needles, and tests