fix reading and writing to eeprom

[hyperion11]

i dont know, why, but int reading was not correct. So i rewrite reading and writing prototypes. check - float int and char values reading and writing correct. and fix

include

on my maple mini with "Wire.h" was not compile correct. and delete wire.begin(); i think this string must be in setup section of sketch. Becouse there is conflics with multiple i2c libraries. If wire.begin() execute twice - system halts.

[Naguissa]

I've only applied the removal of Wire.begin. That was needed when library was created, few years ago.

Commit: https://github.com/Naguissa/uRTCLib/commit/7a0bbecd6044b69d80019e358e7ffe8a3c6516b0