merged audit_event into audit_atom and removed table. removed obsolete table audit_content.
add migration stub.
bumped migration counter.
bumped the other migation counter.
Merge branch 'master' into issue337
declared default values on new columns in 'audit_atom' table.
implemented migration's up() method.
removed root_atom column from audit_atom table.
purged audit_content table from model.
dropped root-atom and blob arguments from wrap(Audit)Atom method signatures.
fixed method reference in docblock.
converted Audit_Event::wrapAtom() into a pure wrapper around Ilios_Model_AuditUtils::wrapAuditAtom()
fixed method reference in docblock.
adjusted the db insertion of audit atoms in saveAuditEvent() according to related schema changes.
renamed Audit_Event class to Audit_Atom. renamed model object var from $auditEvent to $auditAtom, everywhere.
renamed file.
updated query in getChangeHistoryForAlert() to match recent schema changes.
eliminated unnecessary loop over result set.
removed column name alias from query.
Merge branch 'master' into issue337