fix unwanted variable expansion in bash heredoc
fix unwanted variable expansion in bash heredoc

* found by @maso27

* http://stackoverflow.com/questions/27920806/how-to-avoid-heredoc-expanding-variables

alexa-pi/AlexaPi,alexa-pi/AlexaPi,fcojersanchez/AlexaPi,fcojersanchez/AlexaPi,renekliment/AlexaPi,renekliment/AlexaPi,sammachin/AlexaPi,sammachin/AlexaPi