remove dynd data descriptor
remove python data descriptor
add uri docs
add interactivity docs
minor edits to interactivity
small fixes to expr-compute-dev
remove examples from index

We should only present this once it is more fleshed out
Merge branch 'master' into gut-data
remove old Python imports
Merge pull request #747 from mrocklin/gut-data

Gut data
README.md -> README.rst
use rst image tag instead of raw html
more rst image tags in README
README: back to raw html
revert back to markdown

(couldn't figure out how to center images in rst)
revert setup.py to point to readme.md
Merge branch 'master' into uri-docs
Merge branch 'docs-fixes'
Merge branch 'interactive-docs'
Merge branch 'uri-docs'