Added support for change column in Schema
Merge branch 'dev-schemaChangeColumn' of https://github.com/nitintutlani/framework into nitintutlani-dev-schemaChangeColumn
working on cleaning up doctrine code.
Merge branch 'master' into nitintutlani-dev-schemaChangeColumn
Continue cleaning up column changer.
Merge branch 'master' into nitintutlani-dev-schemaChangeColumn
remove dependency.