[MISC] Rework build process

For Linux, BSD, Toasters and OSX, rework the build process to use more features from autotools.

• Build an AppImahe
• Understand why all .m4 files are not in the M4 folder
• Understand why files for the configure don't go in their own folder
• Understand why the autorecongf doesn't create the config.sub and config.guess files
• Place headers in some other directories of their own (or the garbage config folder) <- don't want to debug the build process...
• Use Makefile.am <- Because of OSX

added Refactor label

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mentioned in merge request !2 (merged)

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marked the checklist item Understand why all .m4 files are not in the M4 folder as completed

marked the checklist item Understand why files for the configure don't go in their own folder as completed

marked the checklist item Understand why the autorecongf doesn't create the config.sub and config.guess files as completed

changed the description

closed

mentioned in commit fbcca085