supply the current adapter on Migration_Base construct to avoid calling another function to set it
Merge pull request #66 from salimane/pr_migration_construct

supply the current adapter on Migration_Base construct
Fix instantiation of migration class
Merge pull request #67 from albhaf/fix_running_migrations

Fix instantiation of migration class
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  Fix instantiation of migration class
  supply the current adapter on Migration_Base construct to avoid calling another function to set it

Conflicts:
	lib/Ruckusing/Migration/Base.php