Natha's Numenéra French Sheet v2.02

HTML encoding of french accents (ReadMe.md,
NathasNumenera_Roll20_Macros_French.md,
NathasNumenera_Roll20_API_French.js,
NathasNumenera_Roll20_CharacterSheet_Layout_French.htm).
Merge pull request #411 from NathaTerrien/NathasNumenera

Natha's Numenéra French Sheet v2.02 : HTML encoding of accents