Clean up test_mongo
Windows does not like multiline commands
More testing cleanup
More testing cleanup
newline only in py3 and only needed on windows
Don't shell out we need to catch the error
Don't shell out for JSON either
xfail correctly on JSON
Last of the shells!
'Jenkins'
Clean up mongoimport testing
We need shells on *nix
Refactor and clean up a bit
Let errors through again
add server to blaze/__init__.py
Server from_tree checks compute_one to find exprs

Previously The server gets a string like `'By'` and queries this
against `blaze.expr` to get the class `By`.

Now we do this but, if it fails, we then check compute_one signatures.
This has the virtue of using the dispatch system to pick up foreign
expressions.
Merge pull request #631 from mrocklin/server-with-foreign-expressions

Server with foreign expressions
Merge pull request #628 from cpcloud/fix-mongo-windows

MongoDB now works on Windows
Add mongodb to windows jenkins
Use -p for installing mongodb