add a line function to canvas

parameters:

start_x ------ line starting place x
start_y ------ line starting place y

finish_x------ line finishing place x
finish_y ------ line finishing place x

width   ------ width of the line
Style ---     color of line 
cap  -----    type of ending  of the line

	{kind: "enyo.canvas.line", bounds: {start_x: 100, start_y: 35, finish_x: 250, finish_y: 35, width: 50, Style: "yellow", cap: "round"}},


Enyo-DCO-1.1-Signed-off-by: John McConnell
 johnmcconnell@yahoo.com