Support RLE mode for samples rates of 50Hz or less. Code from hhermsen
in issue #9.
This is a work in progress. Hopefully RLE can be added for higher
sample rates in the future.
Set clock speed to 16MHz. Hopefully this value works fine with the
client since the previous 100MHz was not the actual clockspeed anyway.
Also, adjust the device.open.portdelay to 1500ms. People can test
their own device for the fastest value, but this should be a safer
default for most people and hopefully eliminates som frustration for
first time users.
The Arduino Mega 2560 is now supported in addition to the regular
Arduino. The Mega supports 8 channels and 7k samples. The ols.profile-*
files are device profiles for the alternative SUMP client. 'AGLA' =
Arduino 'AGLAM' = Arduino Mega
