Add EEPROMClass and examples (espressif#1034)

* enchanced EEPROMClass * Added eeprom examles and modified partition * added eeprom class and extra examples * No changes * No changes * added eeprom class and examples * fixed typo * length() returns user-defined sector size * updated and annotated example

Author: fedy0

libraries/ArduinoOTA/examples/BasicOTA/BasicOTA.ino

@@ -65,4 +65,4 @@ void setup() {
 
 void loop() {
  ArduinoOTA.handle();
-}
+}