adding constructors

mishmash.go

@@ -2,6 +2,7 @@ package mishmash
 
 import (
 	"fmt"
+	"hash"
 	"os"
 	"strconv"
 	"strings"
@@ -96,6 +97,10 @@ type Mishmash32 struct {
 	accumulator uint64
 }
 
+func New32() hash.Hash32 {
+	return &Mishmash32{}
+}
+
 // Sum appends the current hash to b and returns the resulting slice.
 // It does not change the underlying hash state.
 func (m *Mishmash32) Sum(p []byte) []byte {
@@ -134,6 +139,10 @@ type Mishmash64 struct {
 	accumulator uint64
 }
 
+func New64() hash.Hash64 {
+	return &Mishmash64{}
+}
+
 // Sum appends the current hash to b and returns the resulting slice.
 // It does not change the underlying hash state.
 func (m *Mishmash64) Sum(p []byte) []byte {