convert playbook to an engine
use jbuilder for the test suite
add default rake task
remove debugger from gemfile
remove 1.9 reference
fix 1.8 issues
fix jbuilder reference
update test suite
fix ruby-debug reference
provide more jbuilder extensions
initialize playbook differently
minor generalization fixes
loosen up default lookup scoping
generalize authorization strategy
determine adapter class in a better way
add raw to error response