Generating a Gene Models database

Preparatory steps
a. Ensure that the file database_login.txt exists in this directory
	and that it contains the mysql username and password for an
	account that has full database permissions.
b. Update the urls and builds in the $gene_models hash structure in
	generate_gene_models.pl, if neccessary.
c. Update the builds in create_summary.sql, if neccessary.
d. The gff for the 'T1DBase Curated' transcripts is, as the name
	suggests, created manually; the file(s) need to be placed in
	the main gene models directory that is provided to the
	'generate_gene_models.pl' script. The filename(s) must be
	prefixed with the species, eg 'human_T1DBase_Curated.gff'.

Execution
1. Execute generate_gene_models.pl; use --help parameter for details.
2. There will probably be errors, since we are relying on files from
	all over the place; fix them, then go back to step 1. Lather,
	rinse, repeat; use the --no_download flag when you already have
	the data, but are getting errors when processing it.

