Fixed blinkServoNumberBaseNumber() setting number to 15 instead flashing (16)

CwPololuSerialServo::blinkServoNumberBaseNumber() was configured with 0x0f (15) instead 0x10 (16). Instead flashing own number, was setting to 15 any connected module.
Merge pull request #1 from alfonsonishikawa/master

blinkServoNumberBaseNumber() setting to 15 instead flashing (16)

Woops. I don't know what I was thinking. Good catch! Merging now. Thanks!