Set community_curated flag on all test annotations
Change PCO: to PECO: in the test data
Use a different PECO term to help pombase tets

The term PECO:0000004 was confusing the test data loader because we terms from
other DBs that have "0000004" as the accession number - and the loader is a
bit dumb.
Set curator when storing a phenotype annotation
Update documentation to mention possible deadlocks
Change curs_map() to avoid holding a write lock
Add script to set missing curator on annotation
Text fix on the instance front page
Update to version v600