HAP-Java 2.0.1

Fixes

Log accessory names instead of futures. #150
Fix rotation speed data type (BREAKING API CHANGE). According to HAP specification it must be float

major refactoring to support optional characteristics
structure and names adapted to HAP spec structure and naming.
structure is following
- accessory package include basis accessory as the listed in HAP spec, plus interfaces for optional characteristics. clients should extend the accessory classes. e.g. WindowCoveringAccessory or AccessoryWithBrightness
- characteristics package consists of all characteristics, optional and mandatory. e.g. TargetHorizontalTiltAngleCharacteristic. The naming is done in accordance to HAP spec.
- services package consists of services, which grouping characteristics. e.g. WindowCoveringService defines mandatory and optional characteristics for a window covering service as it is defined in HAP spec.
- server package consists classes to run HomeKit server and handle communication
the process is following: client, e.g. openHAB bindings, extends accessory classes, e.g. WindowCoveringAccessory and implements all required methods. WindowCoveringAccessory is linked already to WindowCoveringService, that in turn is link to single characteristics.
linked service support

Valid values are supported for enum characteristics instead of min and max values
Supported valid states for Thermostat, SecuritySystem, HeaterCooler and HumidifierDehumidifier [#108] #120
Support for FilterMaintenance. Can be used as a linked service for an Air Purifier #124

null values are now allowed, since Homekit allows them.
SecuritySystemAlarmType and TargetSecuritySystemState now match the Homekit documentation #44 #45
Null pointer exception no longer thrown if a characteristic is not implemented #32
Fixed incorrect support for BatteryLevel in battery-powered accessories. Appropriate characteristic is battery status. #50
Clear all connections in SessionManager during HomekitRoot.stop() #54
Fix issue in which communications would drop when encrypted frames didn't line up with network frames #64
Fix various spec violations and optimize communications to improve performance #65
Fix a pairing issue in which HAP-Java could listen on a different interface than that which it advertises #67
Allow window covering to be used without optional characteristics. The inclusion of HoldPositionCharacteristic did terrible things, and we're still not sure why. Addressed #56
Air Purifier didn't support rotation speed characteristics. #124