* change API access control to use function name suffixes
* implement settings interface with baseline configuration
* make AP properties configurable
* AP SSID can now contain partial MAC address
* update more quotation style and documentation
* remove captive directory change from network mode switcher.
* Move logger.lua;
* update quotation style in several files;
* add proposed configuration key layout to conf_defaults.lua;
* move dump function to utils.lua;
* implement (very) basic unit testing environment;
* fix bugs in various functions in utils.lua;
* checkin of preliminary REST API test code.
