acu150736 restore old class names for 1.5.9 compat
acu150736 bump version
acu150736 make exceptin initializer compatible with 1.5.9
acu150736 update changelog
acu150736 code review feedback and bug fix
Merge pull request #51 from rightscale/salmon_14_02_acu150736_restore_semver_compatibility

acu150736 restore old class names for 1.5.9 compat