Document the need to encode query string params

Fixes #362

 Auto focus primary form input on page load

Fixes #361

Fix installation on CentOS 6

We use a patched magic package to work with the version of magiclib that
is packaged with CentOS 6.7.

https://stackoverflow.com/questions/34541129/mutalyzer-py-test-fails-with-python-magic-error

Release 2.0.17

Rollback db session after batch job exception

Exception tracebacks should be written to our logs only, not reported to
the user.

This doesn't fix #352, but should at least alleviate most of the pain.

More information in Entrez connection errors

Fixes #351

Documentation updates

Fixes #3

Update about page and link to new mailing list

Encode unicode email addresses before sending mail

Travis updates

Check for selection of transcript in pos converter

Position Converter should error when no gene or transcript is specified
on accession numbers where this is required.

Fixes #190

Links in standalone mode should retain this mode

Fixes #287

Update dependencies

Mutalyzer used the `reverse_complement` function from the description
extractor, which was a unicode string-only implementation.

With this update, that implementation was removed and the BioPython
reverse complement function used instead in the description
extractor. Unfortunately this cannot work with unicode strings, so we
now use our own `reverse_complement` which works on unicode strings.

Minor clarification in release docs

Release 2.0.16

Only run import-reference on mitochondrial refs