message: bindings/python: complete readme with build steps
diff: ### Overview
  The SDK provides bindings for Python using [pybind11](https://github.com/pybind/pybind11).
  +### Generating the library
  +To generate the python library the following steps must be done:
  +* build the sdk depending on your platform: https://github.com/analogdevicesinc/aditof_sdk#supported-host-platforms
  +* go to the build folder and set the WITH_PYTHON flag to on:
  +##### LINUX
  +```
  +cmake -DWITH_PYTHON=on ..
  +make -j4
  +```
  +
  +##### WINDOWS
  +```
  +cmake -DWITH_PYTHON=on ..
  +cmake --build . --config Release (or Debug depending on the configuration) -j 4
  +```
  +
  +* the aditof-python dll/so will be generated in build/bindings/python. You must copy the library next to the script
  +that you want to use.
  +
  +### Import the library in a script
  To use the bindings for a Python project, just import the library:
  ```python
  import aditofpython as tof
  