Adding dep files and dependencies.

vendor/github.com/montanaflynn/stats/errors.go

@@ -0,0 +1,22 @@
+package stats
+
+type statsErr struct {
+	err string
+}
+
+func (s statsErr) Error() string {
+	return s.err
+}
+
+// These are the package-wide error values.
+// All error identification should use these values.
+var (
+	EmptyInput  = statsErr{"Input must not be empty."}
+	SampleSize  = statsErr{"Samples number must be less than input length."}
+	NaNErr      = statsErr{"Not a number"}
+	NegativeErr = statsErr{"Slice must not contain negative values."}
+	ZeroErr     = statsErr{"Slice must not contain zero values."}
+	BoundsErr   = statsErr{"Input is outside of range."}
+	SizeErr     = statsErr{"Slices must be the same length."}
+	InfValue    = statsErr{"Value is infinite."}
+)