kliment/Printrun — pull request #247 by ajd4096 (2012-06-28 13:22:45+00:00)
Title: Add optional wait timeout to printcore send, send_now

I have a pronsole macro to do Z-axis probing which needs to stay in lock-step with the machine.
This patch allows each command wait for the matching "ok".

It doesn't work if the command is actually multiple commands concatenated.