Distribute executable instead of Python sources

[bitkeeper]

Case:

Currently the LPM-installer distributes the Python source of LPM.
Consequences are:

• The dev is required to have Python installed.
• Correct working could depend on the installed python version.
• The global python environment is populated with specific packages and versions stated in the requirements.txt.

Proposal:
Let the LPM-installer distibute an standalone executable build with pyinstaller.
To prevent Windows issues, this executable should also be codesigned.
Use a local virtual environment to install the runtime and development package on the develop and build machine.