fixed typo in functions comments, SLEEP_1S was repeated twice, changed to SLEEP_8S where appropriate
added short readme file to repository, mainly to explain how to rename the folder to make it work with Arduino
Fixed small typo in capitalization of an enumerated constant SLEEP_15MS
Merge commit 'ff4feb2ac103d86972dcc14141f69262b1e22934'

* commit 'ff4feb2ac103d86972dcc14141f69262b1e22934':
  Fixed small typo in capitalization of an enumerated constant SLEEP_15MS
  added short readme file to repository, mainly to explain how to rename the folder to make it work with Arduino
  fixed typo in functions comments, SLEEP_1S was repeated twice, changed to SLEEP_8S where appropriate