C104

- Fix (1.14.2): Fix potential segmentation fault

- Fix (1.14.1): Add missing option c104.Init.NONE

- Add c104.Init enum to configure outgoing commands after START_DT, defaults to c104.Init.ALL which is equal to previous behaviour

- Clients timeout_ms parameter is used to configure maximum rtt for message in lib60870-C \
(APCI Parameter t1: max(1, (int)round(timeout_ms/1000)))

- __BC callback signature validation__
- Allow functools.partial, functools.partialmethod and extra arguments in callbacks that have a default/bound value
- Ignore arguments with non-empty default value n callback signature validation

- Fix (1.13.6): try send clock sync only once after start_dt

- Fix (1.13.5): Silence debug output, update dependencies

- Fix (1.13.4): PointCommand encode REGULATION STEP COMMAND values, windows stack manipulation in server

- Fix (1.13.3): IncomingMessage decode DOUBLE POINT values 0.0, 1.0, 2.0, 3.0

- Fix (1.13.3): IncomingMessage allows 0.0,1.0,2.0,3.0 values for DoubleCommands, message.value returns value instead of IOA

- Fix (1.13.2): Server sends multiple ASDU per TypeID in InterrogationResponse or Periodic transmission if IOs exceed single ASDU size

- __BC for on_clock_sync__ \
Callable must return a bool to provide act-con feedback to client
- __Respond to global CA messages__ \
Fix: Server confirms messages that are addressed at global ca from each local CA with its own address.

- __Replace BitSets by Enum flags__ \
Change usage of Debug and Quality attributes
- __Start periodic transmission instantly__ after receiving START_DT, do not wait for a first interrogation command

- __Add python 3.6 support__

- __Add Windows support__

- __Migrated from boost::python to pybind11__ \
Drop all dependencies to boost libraried and replace bindings by header only template library pybind11.
- __Simplified build process via setuptools and cmake__ \
Integrate lib60870 into cmake to build everything in a single build process.
- __Improve callback handling__
- _Function:_ A __reference__ is stored internally with valid reference counter.
- _Method:_ A __reference__ to the bounded method is stored internally.

- __Add ARM support__

- __New DebugFlag: GIL__ \
Print debug information when GIL is acquired or released.
- __New coding convention for callbacks:__
- Callback function signature must match perfectly (variable names, order, return and type hints).
- _Lambda:_ Usage of lambda function is __not possible__ as type hinting information are not added to the function object itself, only to the namespace the object is stored in.
- _Function:_ A __copy__ (type.FunctionType) is stored internally using the same references as the original function to guarantee function existence. (^1.10.2)
- _Method:_ A __reference__ to the object is stored internally with the name of the method. (^1.10.2)

__New coding convention:__ Caller passes self-reference as first argument to callback functions.

- Client.on_new_station: Client reference as additional argument in the first place
- Client.on_new_point: Client reference as additional argument in the first place
- Connection.on_receive_raw: Connection reference as additional argument in the first place
- Connection.on_send_raw: Connection reference as additional argument in the first place
- Server.on_receive_raw: Server reference as additional argument in the first place
- Server.on_send_raw: Server reference as additional argument in the first place
- Server.on_connect: Server reference as additional argument in the first place
- Server.on_clock_sync: Server reference as additional argument in the first place
- Server.on_unexpected_message: Server reference as additional argument in the first place