Adds Ability to customize separator line style (join, cap, dash lengths & phase) in CKStyleView.

Example of stylesheet :

            "backgroundView" : {
                    //Customizing background
                    "backgroundGradientColors" : [ "1 1 1 1", ".5 .5 .5 1" ],
                    "backgroundGradientLocations" : [ 0 , 1 ],

                    //Customizing separator
                    "separatorColor" : "yellowColor",
                    "separatorWidth" : 4,
                    "separatorDashLengths" : [ 10, 10 ],
                    "separatorDashPhase" : 5,
                    "separatorLineCap" : "kCGLineCapRound",
                    "separatorLineJoin" : "kCGLineJoinBevel",

                    //Customizing emboss
                    "embossTopColor" : "greenColor",
                    "embossBottomColor" : "blueColor",

                    //Customizing border
                    "borderColor" : "darkGrayColor",
                    "borderWidth" : 4,

                    //Customizing border shadow
                    "borderShadowColor" : "1 0 0 .5",
                    "borderShadowRadius" : 5,
                    "borderShadowOffset" : "5 5"
                },