Added Opacity Style to background-rotator

Added an opacity style to the background rotator so that the opacity can be easily changed.
Updated Settings page

Updated the settings page and added 2 buttons to the top of the page, one for Timers and the other for Advanced Settings.

Also moved 'Torrent Directory' and 'Torrent Streaming' settings to the new Advanced Settings page.
Created Advanced Settings Page

Created new page containing advanced settings. New advanced settings include Background Opacity Control and enabling or disabling the progress bar that appears when downloading torrents. The two other advanced torrent options are here as well.
Added new settings page

Added new url that links to settings-advanced.html
Added two new settings

Added settings for torrent progress and background opacity
Added function for changing background opacity

Added Function to change the background opacity.
Added check to see if torrent progress was disabled

Changed the code around to check for various things, if torrenting is enabled is then goes into the two sub checks that check if torrenting.progress is enabled or disabled.
Fixed small coding error

Fixed a missing >
Reworded Background Opacity description
Merge pull request #136 from Js41637/advsettings

[Enhancement] Advanced Settings by Js41673. Adds Tab interface and opacity settings