Added check for Web Storage
Added empty configuration module
Added function to read and write configuration storage
Added function to get configuration value with default
Added function to set configuration value
Merge branch 'feature-configuration'
Added empty trackbar module
Added trackbar CSS
Added empty Trackbar class
Locate mark element of trackbar
Added value parameter to Trackbar contructor
Added min and max value parameters to Trackbar contructor
Added function to refresh trackbar view
Added function to convert x coordinate to trackbar value
Added function to get value of Trackbar
Added function to set value of Trackbar
Added touch event handler stubs to Trackbar
Implemented onTouchStart
Implemented onTouchEnd
Implemented onTouchMove