Added Gender for ToOrdinalWords (needed for Brazilian Portuguese)
Added pt-br localisation gender for number to words.
Added pt-br localisation for ordinal words, with gender.
Pull Request #196 added to release notes
Moved English ordinal tests to NumberToWordsTests
Some minor formatting fixes
Added readme documentation for ToOrdinalWords with Gender.
Updated readme to state Ordinal Gender is optional.
tidied up BrazilianPortugueseNumberToWordsConverter
explained optional gender for ToOrdinalWords a bit more
Merge branch 'pt-br-towords-ordinal'
removed INumberToWordsConverter
reformatted NumberToWordsExtension
releasing v1.21.1
added Dutch numbers to words support
replaced tabs with spaces
fixed failing tests
updated release_notes.md
replaced ConvertToOrdinal with an easer to follow implementation
DutchNumberToWordsConverter now inherits from DefaultNumberToWordsConverter
updated release notes
minor cleanup