See #707

Fixes #888

PHP 5.4+ can use phpunit v4.8.26 without generating any warnings.
HHVM cannot use phpunit v4.8.26
HHVM CAN use phpunit v5.4.6, but produces deprecated warnings - warnings only that are resolvable and do not interfere with the build or code coverage.

To achieve this, a build matrix is used such that PHP uses --prefer-lowest (which is phpunit v4.8.26) and HHVM uses the most recent version (phpunit v5.4.6 at this moment in time).

Fixes #884

Fix - removeColumn in change() instead of up()

Method removeColumn() is not supported in change() method according to http://docs.phinx.org/en/latest/migrations.html#the-change-method.

Fix failing phpunit for hhvm

Not using the --prefer-lowest.
Not using PHPUnit v3.x
hhvm is no longer allowed to fail

Fix MysqlAdapterUnitTest ...

  Test\Phinx\Db\Adapter\MysqlAdapterUnitTest::testCreateTableAdvanced
  Trying to configure method "onDelete" which cannot be configured because it does not exist, has not been specified, is final, or is static

  Test\Phinx\Db\Adapter\MysqlAdapterUnitTest::testAddForeignKeyBasic
  Trying to configure method "onDelete" which cannot be configured because it does not exist, has not been specified, is final, or is static

@todo Upgrade to use PHPUnit 5 and refactor unit tests to remove...

  PHPUnit_Framework_TestCase::getMock() is deprecated, use PHPUnit_Framework_TestCase::createMock() or PHPUnit_Framework_TestCase::getMockBuilder() instead

Standardise the breakpoint related queries

Introduces a new method \Phinx\Db\Adapter\PdoAdapter::castToBool()
By default, 0 and 1 are fine for mysql, sqlite and sqlsrv for boolean types.
Postgres must use true and false for boolean types.

Fixes #873

Introduce breakpoint support for rollbacks

Allow breakpoints to be set to stop accidental rollbacks. When a breakpoint is set, rollback will stop when it reaches that migration.
Can be overridden with --force.

Introduce support for InputInterface alongside OutputInterface

This commit contains a backward incompatibility for template creation classes.
Upgrade notes exist in UPGRADE_0.6.md

Added Richard Quadling to list of authors
Minor refinement to CreateTest to take into account some future changes

Updated code to look at a seed set, rather than a string requiring explosion.
Updated tests to supply a seed set, rather than a single string.
Update documentation to reflect new functionality.

"[InvalidArgumentException] The seed class "" does not exist" when trying to run all the available seeds

Add support for SQLite enums using CHECK().