Modified README
Added updating of etc/local/update scripts.
Reorganized libs for better code reuse, especially related to settings.
Added common sub-routines to libs/common.sh.
Added libs/plugin-init.sh and added a simple manual test framework.
Added libs/sudo.sh to handle running commands as different users, moved some logic into there.
Fixed permissions
Added routines for checking out Git repositories and initializing versioned libraries and services based on them.
Fixed perms on test update fixture