Added french days/months

src/lang/FR

@@ -0,0 +1,40 @@
+	String monthStr(const uint8_t month) {
+		switch(month) {
+			case 1: return  F("janvier");
+			case 2: return  F("fevrier");		
+			case 3: return  F("mars");
+			case 4: return  F("avril");
+			case 5: return  F("mai");
+			case 6: return  F("juin");
+			case 7: return  F("juillet");
+			case 8: return  F("aout");
+			case 9: return  F("septembre");
+			case 10: return F("octobre");
+			case 11: return F("novembre");
+			case 12: return F("decembre");
+		}
+		return "";
+	}
+
+	String monthShortStr(const uint8_t month) { 
+		switch(month) {
+			case 6: return  F("jun");
+			case 7: return  F("jul");
+		}	
+		return monthStr(month).substring(0,3);
+	}
+
+	String dayStr(const uint8_t day) {
+		switch(day) {
+			case 1: return F("dimanche");
+			case 2: return F("lundi");
+			case 3: return F("mardi");		
+			case 4: return F("mercredi");
+			case 5: return F("jeudi");
+			case 6: return F("vendredi");
+			case 7: return F("samedi");
+		}
+		return "";
+	}
+
+	String dayShortStr(const uint8_t day) { return dayStr(day).substring(0,3); }