Modified servlet to read configuration properties based on paths given in web.xml (src/main/webapp/WEB-INF/web.xml).

default is:

    <context-param>
        <param-name>MedSavantConfigFile</param-name>
        <param-value>config.properties:/etc/medsavantjson/config.properties</param-value>
    </context-param>

In this config, servlet will look for config.properties in the root of the .war file, and if it's not found there, it will look in /etc/medsavantjson/config.properties on the filesystem.
A sample config is in /config.properties.sample of this project (to follow in next commit)
Added sample config