* schema:
  add uuid primary key support
  separate primary key from column type
  push the mysql add_column up to the abstract adapter
  allow multiple add columns
  pull add_column_options! off the pg connection class
  add a pg visitor for dealing with schema modification
  push alter table add column sql in to the schema modification visitor
  there is no reason to check for an already defined column
  push column initialization down to the factory method
  @columns list is no longer necessary
  keep ivars private, do not manipulate them outside their owner object
  factory methods should not alter object state
  push SQL generation inside the schema creation object
  mostly decouple TableDefinition from the database connection
  remove to_sql from TableDefinition
  decouple column definition from the database connection
  stop depending on sql_type in pg
  remove knowledge of SQL from the column definition object

Just raising from the rescue block will re-raise the exception, so the
variable is not necessary.

Removed unused loop variable

Removed unnecessary block

StringIO is not required by default in JRuby

Use the "quit" command instead. This seems to prevents some weirdness on
OS X. See #9761.

test-case to prevent resetting associations when preloading twice.

Conflicts:

	activerecord/lib/active_record/associations/preloader/through_association.rb
	activerecord/test/cases/associations/eager_test.rb

When strong_parameters had been included, this case of update became possible

SIGTERM is the correct signal for a graceful exit.

This will hopefully resolve #9761.

I don't think this is testing anything useful, and the test code is
exceedingly brittle. It is broken since
34c7e73c because the test code makes
assumptions about the implementation of PostgreSQLAdapter#active? which
are incorrect after the commit.

I could fix this test but it would be even more brittle (by stubbing the
underlying @connection.connect_poll) and it doesn't test any complex
logic. I conclude that it's not worth it.

Change Standard error when is required bcrypt-ruby and fails

Allow fixture_path to be a Pathname

Adding a bang to method name of raise_on_type_mismatch.