Add subclass of StableIdGenerator::EnsemblGeneric to do Anopheles gambiae stable ID incrementation and verification.

"my" variable $sth2 masked earlier declaration in same scope ..

adding the reset_DBAdaptor and remove_DBAdaptor changes that were checked into the head but missed the
v51 branch

the checked-in version of this module.

to display features from userdata db on a slice from core db we have to use slice adaptor from userdata db

ensembl-51'.

Sprout from master 2008-10-27 21:30:31 UTC Glenn Proctor <gp1@sanger.ac.uk> 'Reverted to 51 schema, patch not in yet'
Delete:
    misc-scripts/protein_match/process_pmach.pl
    sql/patch_51_52_a.sql
    sql/patch_51_52_b.sql
    sql/patch_51_52_c.sql
    sql/patch_51_52_d.sql

Modified $cs->equals to cope with DAS::CoordSystem

  When testing for existance of an object xref entry with
  linkage_annotation, treat NULLs as equals.

+ some formatting.