change some html ids
simplify some view partial names
views: add a table for layout
use `include` instead of `helpers`
remove commented out example
make `h` a module function
rename HTML helper to General
add a stub of Monitor helper

Monitor helper is for functions used in presenting manager task and command monitoring information.
CSS: add styles for notification classes
add comments to explain what helpers are
create an infrastructure for input processors
use plain Ruby instead of Sinatra for extensions

Plain Ruby `extend` should work as well as Sinatra's hackish `register`.  (Check Sinatra's source code.)