def get(document_uri)
			validate_uri(document_uri)
			res = HTTParty.get(document_uri, @default_opts)
			res.success? ? res.body	: handle_error(res)
		end
def get(document_uri)
			validate_uri(document_uri)
			res = HTTParty.get(document_uri, @default_opts)
			res.success? ? res.body	: handle_error(res)
		end
Initializes an EasyExist::DB.

 @param url [String] the url to the eXist-db server, include protocol.
 @param opts [Hash] options to initialize the DB with.
 @option opts :collection [String] The collection for which all GET, PUT and DELETE requests will be relative to.
 @option opts :username [String] Username for Basic HTTP Authentication.
 @option opts :password [String] Password for Basic HTTP Authentication.
 @return [EasyExist::DB] an instance of an EasyExist::DB.
 Retrieves the document at the specified URI from the store.

 @param document_uri [String] the URI of the document to retrieve.
 relative to the collection specified on initialization otherwise '/db'.
 @return [String] the contents of the document at 'document_uri'