tell the user to pick the CREATOR/GAMER lid before selecting project
edit hardware hacker instructions, create a demo program for the accelerometer
add a reset script to reset demo project files
add two button tester program to demos
add temporary hack to manually set up led_matrix list if using GAMER lid, ie when pin 14 is not grounded
fix typos on button_hookup.html
Merge pull request #72 from scottsilverlabs/dev/jpsnyder/demo/instructions

 Dev/jpsnyder/demo/instructions (part 2)