Add transformers

This adds transformers which can be applied globally or per column. This makes it possible to clean up input (e.g. trim). Also the dependencies were upgraded and the README.md enhanced.

Enhance unique constraint

Merge pull request #11 from openscript/develop

Enhance unique constraint implementation

Enhance validation

0.2.2

Bump version to 0.2.2

Validation

This release contains the validation implementation.

Reset parsed on empty raw data

0.1.5

Reset on empty raw data

Enhance callback handling

Merge pull request #5 from openscript/develop

Enhance callback handling

Export hook to make integrations possible

Merge pull request #4 from openscript/develop

Export hook for integration

Reorganize exports

0.1.2

Enhance README.md

Enable composition

Merge pull request #1 from openscript/develop

Make dsv import compositable

0.0.7

Export everything from DSVImport