netvor/imapdomo: imapfilter convenience wrapper

imapfilter convenience wrapper

Alois Mahdal 78747b5460 Add head() method to get first N messages in sequence		3 lat temu
..
imapdomo.lua	Add head() method to get first N messages in sequence	3 lat temu
imapdomo.skel	Remove unnecessary execution bit in src	4 lat temu
imaprules.lua	Fix messed up rule insertion method	5 lat temu
main.lua.skel	Revamp packaging to achieve more correct Lua style	5 lat temu