Changed pin 7 to 8 to match documentation
in Example 02, changed pin 7 to 8 to match schematic
Merge branch 'master' of https://github.com/gmckeever/arduino-101-workshop

Changed pin 7 to 8 in button 02 example.
Changed pin 7 to 8 in button.rb to match schematics
In example 2, switched pin 7 to 8 to match schematics
In example 02, switched pin 8 to 7 to match schematics