Fixed bug #64671 (Add stomp_nack and Stomp::nack functions).
Make sure connection is closed on error
Make stomp_set_error() to be printf like (mi+php at aldan dot algebra dot com)
Fix error message mismatch
Release stomp v1.0.6
1.0.6 => 1.0.7-dev
add missing LICENSE file (mandatory for downstream)
Fix error message on invalid receipt
Improve frame stack and add test