flatpak: update files following names change + Python 3 update: - `build_manifest.py` has been fixed to work with recent SàT/Libervia - filenames/scripts have been udpated to reflect project name change - installation now uses `requirements.txt` when dev version is requested - there are now 3 types of commands wrapper: * `libervia_wrapper.py` uses `pb` bridge, starts backend before frontend, and stops it when frontend is stopped. It's used by `Libervia Desktop` (Cagou) * `libervia_wrapper-dbus.py` uses `dbus` bridge, starts backend before frontend, and stops it when frontend is stopped. It's used for `Libervia TUI` (Primitivus) * `libervia_wrapper-dbus.py` uses `dbus` bridge, starts backend if necessary and doesn't stop it (to avoid waiting for backend start next time). It's used by `Libervia CLI` (jp).

{
    "app-id": "org.salutatoi.SAT",
    "branch": "0.7.0a2",
    "runtime": "org.salutatoi.Platform",
    "runtime-version": "0.7.0a2",
    "sdk": "org.salutatoi.Sdk",
    "command": "sat",
    "finish-args": [
        "--share=network",
        "--filesystem=home"
    ],
    "modules": [
        {
            "name": "sat",
            "buildsystem": "simple",
            "build-commands": [
                "install -D /usr/bin/sat /app/bin/sat",
                "install -D /usr/lib/python2.7/site-packages/sat-0.7.0a2-py2.7.egg/share/dbus-1/services/org.salutatoi.SAT.service /app/share/dbus-1/services/org.salutatoi.SAT.service"
            ]
        }
    ]
}