BREAKING CHANGE record_end saves to PLAYBACK_DIR (if defined) or to ./features/playback
BREAKING CHANGE default playback search directory is changed from ./ to ./features/playback
Merge branch '0.9.x' into 0.9.x-playbacks-should-not-be-saved-to-local-dir

Conflicts:
	calabash-cucumber/lib/calabash-cucumber/core.rb
now does exhaustive searching for compatible playbacks, including when
device is ipad.

replaces the Dir.exists? call with File.directory? to be compatible
with ruby 1.8.7
Merge pull request #182 from jmoody/0.9.x-playbacks-should-not-be-saved-to-local-dir

./features/playback should be the default directory for playbacks and record_end should save to that directory if PLAYBACK_DIR is not defined