Create portal-highlighter-with-L8-resonators.js 

initial
Update and rename portal-highlighter-with-L8-resonators.js to portal-highlighter-with-lvl8-resonators.user.js

1. update userscript block with @@...@@
2. rename to portal-highlighter-with-lvl8-resonators.user.js
Update portal-highlighter-with-lvl8-resonators.user.js

1. clean unused code.
2. more L8 resos, portals get brighter.
Merge pull request #330 from superdhuang/master

add plugin: highlight portals if it has L8 res