Update documentation and links.
Rename refs database to bigsdb_refs for consistency.
Don't go over 80 char lines in bigsdb.conf
Change default tmp directory to /var/www/tmp in bigsdb.conf.
Change path to curate script in header.html
Download alleles: Get allele count for loci by scheme - all loci.
Give isolate contig file proper name for download.
Make sure sequence attribute fields are included in Excel template.
Field breakdown: Message if no displayable fields available.
The isolate database template has very minimal fields and there are
actually no fields to breakdown using it.   Normally additional fields
would be added to the isolate table on setup.
Context-sensitive help.
Improve layout of bigsdb.conf.
Fix allele_sequence update link.
Typo.
EMBL export: Set end to contig length if predicted end is greater.
This was creating EMBL files that would not load in Artemis.
Add links to documentation in HTML header files.
Remove commented-out obsolete links in HTML header.
Respect set_id when displaying profile history.
Allow upload of diploid sequence definitions.
Properly identify sequences in diploid schemes.
Diploid schemes use IUPAC ambiguity codes in their sequence definitions
but BLAST+ treats all ambiguities as mismatches.  In diploid databases
we can use the output of BLAST to find potential matches, but then use
regular expressions to determine if the sequence is an exact match.
Seq query: seq_type is the same as qry_type - don't check if valid DNA.