Remove need for config panel

We were not taking advantage of some of Knockout's awesome binding
abilities, so move url adding to the of the page.
Log's first words are capitalized for reading
Builds can have their own polling frequency

Polling frequency defaults to 30 in the form, but each build can set
it's own frequency that is remembered across page refreshes.
Small url input style tweak
Always clear a previous retry timeout on a build

This ensures that a build cannot ever double up on it's polling.
 Improve Polling Error management

 Solves the timeout and refresh issue of #5. Automatically retries
 to contact Jenkins with the same polling frequency. Only display
 information when Jenkins API does not error, otherwise display
 "helpful" message that there was an error polling Jenkins.
Always be able to remove jobs