acu134934 create FeatureConfigManager and refactor class reading from features.yml to use it
acu134934 implement rs_config utility
acu134934 read decommission timeout from features.yml
acu134934 fix features.yml creation
acu134934 add different formats for rs_config --list output
acu134934 keep specs green
acuacu134934 rs_config --list output all features even if they are missing in features.yml
Merge pull request #289 from rightscale/ivory_13_20_acu134934_rs_config_utility

 User defined decommission timeout