updating look and feel for linear sliders
finished updating linear sliders with new look and feel methods
add new popup box for linear slider values;added edit box for linear slider values;added double-click reset for linear sliders;
updating sliders, added outline colours, and made it possible to remove inner circle completely
updating
added 2 and 3 value sliders. updated min and max identifiers so that they control the min and max values of 2 and 3 value sliders
added channels for multi value sliders, should be fine in a host now
added custom RangeSlider class
finished custom range slider class
closing lookandfeel branch