New MH-apkg format

With next myHD version we introduce differentiator between Ubuntu environment supported by MH-apkg (companion application to myHD)
MH-apkg … are for all Ubuntu (1604 or 1804) it’s generally because we use the software and dependency provide by Ubuntu repository.
MH18-apkg … are ONLY for Ubuntu 18.04 (ex. when require libraries are not available in 16.04 or recompilation are necessary for software available only as source code).
MH16-apkg … idem but ONLY for 16.04.

Due to change in name … in case of update from old MH-xxx and new MH18(or 16)-xxx, you are invited to remove the old MH-xxx after you install the new one (only for Plex Media Player at this time).