moved all SQL queries into single Database module

Oh yeah, that as well. It wasn't being used or test and seems like a
premature optimization.

On Fri, Dec 12, 2014 at 4:12 PM, Tavi Nathanson <notifications@github.com>
wrote:
>
> In pyensembl/database.py
> <https://github.com/hammerlab/pyensembl/pull/16#discussion-diff-21773589>:
>
> > @@ -0,0 +1,298 @@
> > +from os.path import join, exists
>
> Looks like there are other changes, like removing the lazy loading flag?
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/hammerlab/pyensembl/pull/16/files#r21773589>.
>