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
Added interval to refresh trackbar marks
Automatically instantiate trackbars when document is loaded
Read current value from trackbar element
Read min and max value from trackbar element
Add event listener from trackbar element
Allow binding trackbar value to configuration value