Added HSV<->RGB GLSL functions.
Added HSV<->RGB GLSL functions.

inclement/vispy,sh4wn/vispy,drufat/vispy,jay3sh/vispy,QuLogic/vispy,RebeccaWPerry/vispy,julienr/vispy,jay3sh/vispy,drufat/vispy,Eric89GXL/vispy,hronoses/vispy,michaelaye/vispy,ghisvail/vispy,ghisvail/vispy,RebeccaWPerry/vispy,dchilds7/Deysha-Star-Formation,QuLogic/vispy,kkuunnddaannkk/vispy,srinathv/vispy,hronoses/vispy,inclement/vispy,sh4wn/vispy,sbtlaarzc/vispy,QuLogic/vispy,kkuunnddaannkk/vispy,julienr/vispy,michaelaye/vispy,hronoses/vispy,bollu/vispy,srinathv/vispy,RebeccaWPerry/vispy,sbtlaarzc/vispy,inclement/vispy,dchilds7/Deysha-Star-Formation,michaelaye/vispy,srinathv/vispy,julienr/vispy,kkuunnddaannkk/vispy,Eric89GXL/vispy,bollu/vispy,drufat/vispy,ghisvail/vispy,jay3sh/vispy,jdreaver/vispy,Eric89GXL/vispy,dchilds7/Deysha-Star-Formation,sh4wn/vispy,jdreaver/vispy,jdreaver/vispy,sbtlaarzc/vispy,bollu/vispy