general cleanup for more automated full build

manage util-linux, tcl-tk before- and after language builds

remove emacs, neovim

remove bash-completion

add neonvim

add gtar and gawk

improvements to get full-build to unattended completion, added ripgrep, silver searcher still has to be installed from command line

append release and update timestamps/git signatures rather than only keeping last

add mutagen and docutils to default build

remove yum actions since we now build with ubuntu

bump up max files ulimit

add makefile

make sure upgrade stanza correctly relinks current python/pip

document single step build and adjust makefile for rebuild of curl if needed

force source code builds for most tools, document library compatibility issues

break out logic to turn of https cert checking into separate make target

build curl and git during bootstrap, disable curl and git cert checking during full build

make sure the brew version of python gets linked before setting symlinks to it

don't build glibc into bootstrap

add datetime and git revision info for bootstrap, full, and upgrades

add texinfo to build instances because some makefiles will fail without it (binutils 2.34)

add makefile support for in place upgrade, add documentation for same

remove ripgrep

install glibc as part of bootstrap process

add ripgrep

simplify bootstrap to minimal required; make sure patch is installed on host because screen formula is broken

change brew git origin to new location

brew prune no longer supported

make sure pip gets updated at install time

upgrade python and pip to v3 henceforth