BTLE revision, removed Google Drive references

simplified the BTLE comm protocol (also made revisions on the arduino
side), removed the Lights class, removed google drive references. Note
that I’ve included fake S3 credentials in the pch file so it will
compile…need to get the actual ones from PJ.
added arduino firmware to repository
adding gitignore file
Merge pull request #5 from UCBerkeleyCellScope/frankie

Frankie's new code!