yaml config file option added
changed -c option to point to YAML file; read certificates from file; same processing for YAML and Redis; updated README
adding feature to track external message IDs
fixing typo
moving ext id to Core
Merge pull request #3 from tilo/feature/tracking-external-ids

adding feature to track external message IDs
Merge pull request #2 from tilo/feature/yaml-change-config-option

Unified Processing for YAML/Redis; -c option points to YAML file; read certificates from files
fixed indentation and syntax error
use to_hash and to_json
cleanup template
methods should be in self
moved external_id_tag to options variable
new ruby style notation
added settings object to config spec
move configuration_file from settings to core, fixes #4
moved attr_accessor to parent object
use configuration.key
configuration_file is now in Core
env should be root
fixed paths in documentation