refactor(injector): rename humanize into stringify

modules/di/src/exceptions.js

@@ -1,9 +1,9 @@
 import {ListWrapper, List} from 'facade/collection';
-import {humanize} from 'facade/lang';
+import {stringify} from 'facade/lang';
 
 function constructResolvingPath(keys: List) {
   if (keys.length > 1) {
-    var tokenStrs = ListWrapper.map(keys, (k) => humanize(k.token));
+    var tokenStrs = ListWrapper.map(keys, (k) => stringify(k.token));
     return " (" + tokenStrs.join(' -> ') + ")";
   } else {
     return "";
@@ -16,7 +16,7 @@ export class NoProviderError extends Error {
   }
 
   _constructResolvingMessage(keys:List) {
-    var last = humanize(ListWrapper.last(keys).token);
+    var last = stringify(ListWrapper.last(keys).token);
     return `No provider for ${last}!${constructResolvingPath(keys)}`;
   }
 
@@ -31,7 +31,7 @@ export class AsyncProviderError extends Error {
   }
 
   _constructResolvingMessage(keys:List) {
-    var last = humanize(ListWrapper.last(keys).token);
+    var last = stringify(ListWrapper.last(keys).token);
     return `Cannot instantiate ${last} synchronously. ` +
       `It is provided as a future!${constructResolvingPath(keys)}`;
   }

modules/facade/src/lang.dart

@@ -21,7 +21,7 @@ class IMPLEMENTS {
 bool isPresent(obj) => obj != null;
 bool isBlank(obj) => obj == null;
 
-String humanize(obj) => obj.toString();
+String stringify(obj) => obj.toString();
 
 class StringWrapper {
   static String fromCharCode(int code) {

modules/facade/src/lang.es6

@@ -19,7 +19,7 @@ export function isBlank(obj){
   return obj == undefined || obj == null;
 }
 
-export function humanize(token) {
+export function stringify(token) {
   if (typeof token === 'string') {
     return token;
   }