if filename is specified, will save source to file rather than in an array
good for big downloads

returns the attribute object associated to a given statistic
updated POD documentation

We can no longer use the REST endpoint http://www.ebi.ac.uk/gxa/dataExport/organisms so
have switched to using their FTP site and some regex patterns against the file
names. Whilst not as nice as the rest endpoint it does seem to work

if ignore release is set for the main xref, it should be inherited by the dependent xrefs as well

unique constraint on _attrib tables, there should only be one value for a given object and attrib_type

Adding missing "use warnings" and "use strict".

added data for transcript count in genome_statistics test data
added test for get_transcripts and get_alt_transcripts in genomecontainer

source column in transcript now has a default value 'ensembl'
when patching databases, will set transcript source to whatever source the corresponding gene is

exists on gene object, now also on transcript object

- Added 'sql_file' option to be able to specify the 'sql.txt' file name.

generated test data for patch test database
database patched up to release 75

creation of a new genome_statistics table

checking total length, not ref

Added method count_all_by_biotype as in GeneAdaptor.