Updated contributing page to lower the bar (it's OK if the build script doesn't pass - I can help with that) and including notes on testing async JS.
Updated contributing page to lower the bar (it's OK if the build script
doesn't pass - I can help with that) and including notes on testing
async JS.

p-equis/mountebank,nassimkirouane/mountebank,p-equis/mountebank,xue2sheng/mountebank,p-equis/mountebank,bbyars/mountebank,nassimkirouane/mountebank,njenan/mountebank,xue2sheng/mountebank,njenan/mountebank,nassimkirouane/mountebank,njenan/mountebank,nassimkirouane/mountebank,bbyars/mountebank,njenan/mountebank