Tidied up imports
Explicitly offer (M)eh as 3rd option
Distro superclass will download via GIT the ArchLinux kernel etc. if
it's missing during build_and_install_from_archinux_git()
Alarpy tarball now lives in skeletons folder in Dropbox
Set up package manager (apt) during install_package_manager_tweaks(),
not elsewhere
Better i2p installing
Use Dropbox tgz for archlinux skeleton