Correct crash when Macro description is not reachable
Python crashed when under proxy - Macro list is charged - Proxy is undone ( internet connection lost) - Try to load macro description (u=None)
Add Proxy setting in Addon Manager Option UI
Correction of SSL context
Replace ssl.Purpose.CLIENT_AUTH by ssl.Purpose.SERVER_AUTH as context for a client
Add configuration of proxy setting UI
Add proxy management by urllib
Read the metadata __Files__ for macros from git and install or remove
files listed there.
__Files__ must be a comma-separated list of files to be copied alongside
the macro. Their path must be relative to the macro (*.FCMacro file)
and not to othe root of the repository. Each file can be prefixed with a
subdirectory.
Separate the Macro class of the AddonManager into addonmanager_macro.py
to prepare for future support for dependent files for macros from the
git repository.
