basic client-side intercom.io integration
report the user creation date to intercom.io
report the number of datasets a user owns to intercom.io
tell intercom which types of dataset a user has created
tell intercom when the user last created a dataset
sign Intercom.io communications with HMAC hash
Big red HELP button in nav bar; slight terminology reshuffle for old help page (now "Docs")
we're not in beta any more
wire up the Intercom button
disable intercom in testing environment (just like google analytics)
only Intercom(boot) once - Intercom(update) thereafter
Merge pull request #456 from scraperwiki/20131125-intercom

Add intercom.io support