edited hotplug script to use link local ip address
cleaned up hotplug script
added new uci alias
fixed execution logic
increased customizability for alias
added warning about alias method deprecation in more recent versions of openwrt
Merge pull request #72 from opentechinstitute/issue69

Issue69 has been tested and is working correctly. /etc/config/network still shows the config stanza for thisnode, but that should be fine per discussion with the lead developer.