1.0.0-preview.4

Implemented column offset

1.0.0-preview.3

Implemented tests

* Modified readme

* Moved bootstrap code into a single file

* Fixed prettier badge

* Added snapshot tests for Container

* Refactored utilities for better testability

* Refactored the main objects for better testability

* Written tests for Column and Row

1.0.0-preview.2

Added content to the Readme

1.0.0-preview.1

Solved yarn publishing conflict