Config Helper Class with `env.properties` config file

[devlinjunker]

setup config helper class to read from config.yaml (and env.properties?)

• config.yaml contains the structure of configuration and default values
• env.properties file should just be format <name>=<value> for parsing and setting values in config.yaml
• think about simple replacement in these name value pairs so we can have "variables" in config file

e.g. 
var=1
host=domain-name-${var}.com

RESULT host=domain-nomain-1.com