[#2002] fill out more upgrade steps and update links to websites (irods.org and wiki.irods.org)
[#2002] fill out more upgrade steps and update links to websites (irods.org and wiki.irods.org)

PaulVanSchayck/irods,leesab/irods,PaulVanSchayck/irods,PaulVanSchayck/irods,janiheikkinen/irods,janiheikkinen/irods,PaulVanSchayck/irods,janiheikkinen/irods,PaulVanSchayck/irods,leesab/irods,leesab/irods,janiheikkinen/irods,PaulVanSchayck/irods,PaulVanSchayck/irods,janiheikkinen/irods,leesab/irods,janiheikkinen/irods,leesab/irods,leesab/irods,PaulVanSchayck/irods,PaulVanSchayck/irods,janiheikkinen/irods,leesab/irods,janiheikkinen/irods,janiheikkinen/irods