Many genbank reference files contain more than one gene, especially
slices from an assembly. Some of these genes may be incomplete in
the reference file (i.e., either start or end exceeds the outer
coordinates). We cannot really do anything with these genes, so we
discard them during parsing.

Given a gene symbol and optional genome build, this returns the location
of the gene.

Primary motivation for this is LOVD, where it will be used in combination
with sliceChromsome as an alternative for sliceChromosomeByGene which only
works on the fixed Ensembl genome build.

Not sure how this came to be, but NCBI36 was incorrectly named GRCh36.
Changing this, however, breaks the sort order in assembly lists. So we
now sort on the UCSC alias (hg18).

Fixes #8

Fixes #9

Upstream Spyne crashes on POST requests to the HTTP/RPC+JSON webservice.
We patched it in a rather hacky way.

This was a regression from the old codebase, where we installed Spyne
separately from our LUMC GitHub mirror. This is now also referenced in
the requirements.txt file.

Thanks to Ken Doig for reporting the issue.