Rearrange and simplify tranql connector svn structure

The svn structure for the tranql connector stuff is way too complicated. This is partly because when we set it up either maven didn't support separate releases of subdirectories under trunk or we didn't know how to do that. I'm moving all the connector stuff under

ra/trunk/*

and eliminating the vendors directory. I'm also adding a tranql-connector-generic directory to hold tranql-connector and tranql-connector-ra.

I'm removing empty old branches directories, but leaving tags in place. The tranql query language code is not moving.