Upgrade serial library.

[bonner72]

Issue:
The Processing serial library does not support flow control or disconnect detection.

Suggestion:
Upgrade the use of the Processing serial library to the jSerialComm library.

[mbahler]

The serial library that Processing uses is currently getting updated (see below links) so this issue will be on hold until further updates are received on the serial library status.
processing/processing4#1194
processing/processing4#1099