expose all configuration settings to the environment; add option memcache.address to work with previous puppet settings
Remove redundant memcache.host and memcache.port settings

These settings were made redundant by db4dbd04f9b23095403b4167fc9da82a76823c53.
Merge pull request #54 from fmarier/jrgm-expose-configuration-settings

Expose configuration settings and merge memcache.host & port