Exported records are far too generic

[jlouis]

When exporting record names, one has to be somewhat wary of name clashes. A name like connection is very general and is often subject to a clash somewhere. Since we only having a global include file, we will often run into trouble here.

My suggestion is that we figure out exactly what records we need to export the name of to the rest of the world. If we can keep information local, I'd much rather do that. And when exporting, we should decide if we are to prefix them with emysql_. See for instance, https://github.com/csrl/emysql/commit/776801e471e59d3eede332bede0d2362e771396a which is one such fix.