Helper API refactor (#40)

* api cleaup

* updates

* wtf

* updates

* snapshot.

* tweaks

* snapshot

* api tweaks.

* updates

* updates

* updates

* changes.

* updates

* updates

* sequence => seq

* dont need to use curl, just using wget

* fixing examples

_examples/scatter/main.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/wcharczuk/go-chart"
 	"github.com/wcharczuk/go-chart/drawing"
+	"github.com/wcharczuk/go-chart/seq"
 )
 
 func drawChart(res http.ResponseWriter, req *http.Request) {
@@ -25,8 +26,8 @@ func drawChart(res http.ResponseWriter, req *http.Request) {
 					DotWidth:         5,
 					DotColorProvider: viridisByY,
 				},
-				XValues: chart.Sequence.Random(128, 1024),
-				YValues: chart.Sequence.Random(128, 1024),
+				XValues: seq.Range(0, 127),
+				YValues: seq.New(seq.NewRandom().WithLen(128).WithMax(1024)).Array(),
 			},
 		},
 	}
@@ -50,8 +51,8 @@ func unit(res http.ResponseWriter, req *http.Request) {
 		},
 		Series: []chart.Series{
 			chart.ContinuousSeries{
-				XValues: chart.Sequence.Float64(0, 4, 1),
-				YValues: chart.Sequence.Float64(0, 4, 1),
+				XValues: seq.RangeWithStep(0, 4, 1),
+				YValues: seq.RangeWithStep(0, 4, 1),
 			},
 		},
 	}