[WIP] Handle sqlite INTO call on Windows

In addition to the PR i built a conda pkg to install `sqlite3.exe` on windows:
```
conda install -c https://conda.binstar.org/blaze sqlite3
```
He catches it just below and defaults to old `sql.extend(csv)` behavior, so it doesn't matter much.

@quasiben `multipledispatch` now supports handling of `MDNotImplementedError`.  If you raise it in a dispatched function then MD will just go and try the next valid signature.  This should simplify a lot of your error handling.  You won't need to manually call `sql.extend(csv)` any longer and can instead trust MD to find the right thing to do.