removed all not null from identityxrefs, will allow easy filliung from old data, all additional fields for alignments, scores anmd analysis are optional

and 'domainname' instead.

about directory names.

More output for create_tables and rotate_daily_tables. Better sth cleanup. Nasty split-ticket hack ported from branch

to stop 'less' from thinking it's a binary file  :-(

<style>...</style>.  Fixed.

"mysql/multi-species" subdirectory, which broke a regular expression.)

Added use_date methods to EnsemblResult type objects. These set the DB tables to write the HSPs and Hits to. Modified BlastAdaptor accordingly

Now uses gzip directly to figure out the uncompressed size
of a gzipped file (this shouldn't be >= 2Gb either...).
Compress::Zlib doesn't do this.