Added functionality to skip SQL use.

Not fully tested, but  should work fine.  If -NoSql is specified in
Get-, it will not send the data to the database.  Send- will still
continue to accept objects from the pipeline.  If it detects it does not
get objects from the pipeline, it will try to use the specified
connection string to pull from SQL.  It will likely bomb if no
connection string is specified and no objects are on the pipeline.