orig from Carl, Tim already made some modifications on this commit, oops
made full HMD downloaded. Still needs extra utils inside to set up
standard folder structure.
made readHMD flexible to files with no Age column. Started HMD
installer. Produces global long format files for each stat type.
minor
quite a bit of progress with install and update functions
HMD installer and updater functions
new installer and updater function documentation, plus namespace and
description changes
global commit, mainly for help index file
update help
Merge branch 'master' into gh-pages