imported mdadm ebuild
updated mdadm build to build mdadm.static
added the patch to build mdadm.static

submitted the patch to  https://bugs.gentoo.org/show_bug.cgi?id=458216
renamed runit to runit_on_openrc
changed dependency from runit to runit_on_openrc
removed all st patches
import st-9999.ebuild from official gentoo tree
added gentoo X11 paths to ebuild
removed st ebuild as the gentoo portage tree is good enough
added zsh-history-substring-search ebuild