catch heroku api errors
test the heroku robustness, minor HerokuClient refactor
oops clean up leftover heroku client vars
Fix all references to deprecated  var
Small code cleanup
Initial AWS scaler for EC2 AutoScaling Groups, not testing
bump memory limit when system is unbound
fix the AWS autoscaler with real testing
Test AWS throws in the right place and update composer
Wrap the fundamental autoscaling operation in a try catch (duh)
Never ask AWS to scale higher than its max
damn you, php
fix a broken refactor
Update concurrency script to be easier to run under composer-install.
Fix signal test, document better.

- Old test *assumed* that the test job would take 2s; this was not true
  on faster computer and tests broke. Test now measures time!
[gh-16] Figure out why we were disabling Propel instance pooling and refactor code so that we can leave it enabled.
Move JQJob from an interface to an abstract class
JQJob has default enqueue options
JQJob now manages its own enqueue options, stop passing them around alongside jobs
update tests around enqueueing option management