Merge pull request #16 from trimble-oss/darwin_build_support

Adding support for darwin builds.

cap/tap/tap_darwin.go

@@ -0,0 +1,16 @@
+//go:build darwin
+// +build darwin
+
+package tap
+
+import "errors"
+
+func Tap(tapMap map[string]string, group string, skipPathControls bool) error {
+	// Unsupported
+	return errors.New("Unsupported")
+}
+
+func TapWriter(pense string) (map[string]string, error) {
+	// Unsupported
+	return nil, errors.New("Unsupported")
+}