Don't test unsupported Ruby version
Updated Gemfile.lock file
Added waffle.io badge
Updated Gemfile.lock file; hard-coded stuck_punch at 0.5.1 and 1.0 breaks test run
1. Update Gemfile.lock file.
2. Upgrade sucker_punch from 0.5.1 to 1.0.1.
Update message text. Fixes #38

SMS message text (validation, confirmation, default responses) should
now be as intended. The wiki now just contains pointers to the config
files that specify that text, since those are fairly well extracted and
should be considered the One True Configuration.

There are some UI improvements that can be made around adding
fulfillment text. See #82.
Remove empty vendor directory
Orders with special instructions should still be marked as fulfilled