Moved executors into a separate sub-namespace
Merge branch 'master' into sql-executor-scripting
Initial attempt at extending SQL support with some basic scripting functionality
Updated DefaultDatabaseVersionRetrievalScheme to allow column name to be set
Updated composer definition and package structure to be PSR-4 Compliant
Renamed test-common to setup
Initial support for SQL insert id enhancement
Fixed bad namespace in DatabaseUpdater, updated test for recent refactoring and some white space fixes