Add feminine gender for french ordinal words

Add feminine gender for french ordinal words + test
Added tests + release notes
Merge pull request #203 from Tradioyes/fr-ToOrdinalWordsGender

Add feminine gender for french ordinal words
ReSharper team settings - add rule for private static readonly fields.
RussianNumberToWordsConverter - promote maps to fields.
RussianNumberToWordsConverter - reduce number of string allocations
PolishNumberToWordsConverter - reduce number of string allocations
FromNow implementation: Years, Months, Days, Hours, Minutes, Seconds
Adding release notes (and fixing a small typo)
Merge branch 'hebrew-fromnow'
RussianNumberToWordsConverter - Implement ConvertToOrdinal
Merge branch 'ru-ToOrdinalWords'
Added missing localisation & precision based DateTime.Humanize to readme