SolR: added auto-update of copy fields

Schema: support for copy fields

Types.Enum: make solr compatible

Added Flags.SolRCopy to define copy fields

MySQL.Database: do not pass remote table to after_ triggers

Added SyncDB.SolR

Initial support for generating SolR schemata

ReaderWriterLock: avoid hypothetical deadlock warnings

MySQL.Table: remove version field from the after_update notification

Database: support generic triggers

MySQL.Filter: added bitwise and

MySQL.Datum: cancel save_later on mark_delete()

MySQL.TypedTable: use after_delete trigger to clear cache

MySQL.TypesTable: typo

MySQL.TypesTable: fixed new fetch optimization