UTF-8 encoding problem solved for excel on mac.

There is an encoding problem if you want to open files in excel on a mac. 

http://stackoverflow.com/questions/4348802/how-can-i-output-a-utf-8-csv-in-php-that-excel-will-read-properly

This fix works. You can open it in excel an a mac now too.
Please also add a note in https://github.com/brookinsconsulting/bccie/blob/master/doc/FAQ which explains why this modification was required with the url, http://stackoverflow.com/questions/4348802/how-can-i-output-a-utf-8-csv-in-php-that-excel-will-read-properly to related information explaining this solution / need. We have had several attempts to put into place platform specific solutions to this problem in the past and we would like to do a better job at documenting them. Thank you for your support!