Merge pull request #141 from maksimov/develop

Fix for a bug causing a ConcurrentModificationException in launchMany
Fixed typo in ScalingGroup

Changed getDefaultCoolcown to getDefaultCooldown
Merge pull request #142 from oldpatricka/fix-typo

Fixed typo in ScalingGroup
Prepare for next development iteration
Merge branch 'develop' of https://github.com/greese/dasein-cloud-core into develop