Updated description

 It reads the state of a potentiometer (an analog input) and turns on an LED
 only if the LED goes above a certain threshold level. It prints the analog value
 regardless of the level.

updated to

 It reads the state of a potentiometer (an analog input) and turns on an LED
 only if the potentiometer goes above a certain threshold level. It prints the analog value
 regardless of the level.
Backported SPI Transcations from 1.5.x
Backported 'yield()' hook from 1.5.x
Backported Ethernet library from 1.5.x
Backported SD library from 1.5.x
Update revision log