We must escape & too

We should depend on Foundation and parse JSON when Linux Foundation has that.

Author: mxcl

Sources/Build/YAML.swift

@@ -30,7 +30,7 @@ extension Array where Element: YAMLRepresentable {
     var YAML: String {
         func quote(input: String) -> String {
             for c in input.characters {
-                if c == "@" || c == " " || c == "-" {
+                if c == "@" || c == " " || c == "-" || c == "&" {
                     return "\"\(input)\""
                 }
             }