Modified SqlServerStorage constructor to take either a full connection string or the name of a connection string to pull from the application config.
Addressed PR feedback.  Modified comments, slight code formatting and organization, fixed failing test based on argument name change.
Changed test to use a syntactically valid connection string instead of string.Empty.
Changed System.configuration to System.Configuration in proj file due to concerns about Mono's case sensitivity.
Merge pull request #113 from dlongest/51-sqlserverstorage-ctor

Modified SqlServerStorage constructor to take name or connection string parameter