For models with composite primary keys, make the Model#primary_key array immutable.
Fix spec in last commit

This spec failed on jruby, rubinius, and ruby 1.8.  Just check that
any error is raised, there's no need to be specific.
Minor MSSQL spec fix

If for some reason the before hook failed half way through, the
after hook would not complete correctly.  This makes sure that
the cleanup still works in that case, and doesn't cause future
runs to fail.
MS SQL optimistic locking with timestamp/rowversion column
Minor fixes for mssql_optimistic_locking plugin (Fixes #732)

Move the plugin specs to the adapter specs, since it tries to test
against a real database, and refactor them so they actual test
that concurrent updates are not allowed.  Add plugin specs that test
for specific SQL.  Also make some minor changes to plugin RDoc.
Fix CHANGELOG reference to issue number (Fixes #731)
Fix usage of Sequel::SQL::Blob objects as prepared statement arguments in jdbc/db2 adapter when use_clob_as_blob is false
Make use_clob_as_blob false by default on DB2

This was only true for historical reasons, because blob
columns originally didn't work well when DB2 support was first
added.  With the previous commit the specs run fine with
use_clob_as_clob = false, so for consistency with other
adapters I'm switching the default.
Don't return clob column values as SQL::Blob instances in the db2 and ibmdb adapters unless use_clob_as_blob is true
Copy unique constraints when emulating alter_table operations on SQLite (Fixes #735)
Make Dataset#insert work on PostgreSQL if the table name is a SQL::PlaceholderLiteralString (Fixes #736)
Remove usage of Rubyforge (Fixes #734)

Switch to hosting the website at sequel.jeremyevans.net.
Remove some unnecessary code from Rakefile
Add support for :on_commit in create_table for postgres adapter
Minor changes for previous commit

Test for behavior, not specific SQL. Don't test for specific
error messages. Update CHANGELOG.
Update plugins
Fix link in last commit
Fix typo in `Sequel.connect` code example
Add ref on how to add pg_array column

#476
Update pg_array.rb