Shorten conversation cycle blog post

Closes marketing#1117 (closed)

@sytses @JobV I created this post based on http://conversationaldevelopment.com/shorten-cycle/. Would welcome any additions from you, would love to include quotes if possible. Thanks!

cc @erica

assigned to @erica

@evhoffmann can you give this a look?

unmarked as a Work In Progress

@erica LGTM, please merge & I'll do social as soon as it's live

merged

mentioned in commit 9e76470e