Added to write function declarations for functions being added to the serial.cpp to support the 9-bit functionality of the processor. 

The "bool wake" allows turning on the 9-bit, also known as the wake bit.

Add two functions and the supporting 9N1 case logic to allow for turning on 9-bit support and sending commands. The second argument, bool, allows for turning on or off the 9th bit, also known as the wake bit. 

Serial1.begin(19200, SERIAL_9N1);
Serial1.write_9bit(0x81, true);
Serial1.write_9bit(&temp[1], false, len - 1);

I removed two unnecessary functions that I added with this pull request to turn on 9bit. There was a little code cleanup /refactoring.

I removed functions that are unnecessary for the 9-bit code to work.

Publish 1.2.2