0.4.0 release
add toRoman() (#15) - bump version number as fix in 0.3.1 was serious - add **toRoman()** - add toRoman example - redo **toBytes()** (less RAM) - update readme.md - update unit test - minor edits
add toRoman() (#15) - bump version number as fix in 0.3.1 was serious - add **toRoman()** - add toRoman example - redo **toBytes()** (less RAM) - update readme.md - update unit test - minor edits