Modified header section to include the twitch chat room selection button which is repurposed to toggle the delay adjustment bar.
Added chat delay adjustment bar below the header which is toggled by pressing the repurposed chat room selection button.
The chat delay adjustment bar contains: 
	-dropdown to select the number of seconds to adjust by
	-button to decrease chat delay by the selected number of seconds
	-display showing the current total delay offset which may be positive or negative
	-button to increase chat delay by the selected number of seconds
Increased 'z-index' property of statusMessage element to ensure it shows above both the header and chat delay sections in all cases.
Added 'arrowleft.png' and 'arrowright.png' to 'common/res/' directory. 
Updated 'Chrome/manifest.json' and 'Firefox/lib/main.js' to include the new resources.
Uncommented resources section in 'setup.sh'.

Replaced chat room button with chat settings button.
Replaced button and drop down controls with slider control that allows selection of a delay between 0 and 5 minutes.
Removed 'arrowleft.png' and 'arrowright.png' from 'common/res/' directory.
Reverted 'Chrome/manifest.json' and 'Firefox/lib/main.js' to original state.
Reverted 'setup.sh' to original state.
Merged changes from master branch.

This reverts commit 561bce7.

manually squashing changes

now uses local storage to remember the delay setting on a per channel basis

Fixed an issue where the delay value loaded from storage was not being properly assigned