~hnaguski/xmetagen

fix xmeta getopts
update readme to reflect changes to xmeta
rename xim to xir, and add xim which installs metapackages from repo, add xrmm to remove metapackges easily
add readme, mess with completions, fiddle with makefile and other scripts
change xim2 to xmeta in makefile
rename xim2 to xmeta and mess with xim's description a bit
add xqm and xrsm and update xim2 to use functions and have some options
Make xim2, which creates a metapackage which installs dependencies.
move usage instructions to separate function and use the basename when printing instructions
don't add an empty entry if you don't give -m
initial commit of xim: a script to add notes as to why you installed something using xbps