docs(core): fix Formatters -> Pipes

long overdue update

Closes angular#1629

Author: PatrickJS

modules/angular2/docs/core/03_formatters.md

@@ -0,0 +1,27 @@
+# Pipes
+
+Pipes can be appended on the end of the expressions to translate the value to a different format. Typically used
+to control the stringification of numbers, dates, and other data, but can also be used for ordering, mapping, and 
+reducing arrays. Pipes can be chained.
+
+NOTE: Pipes are known as filters in Angular v1.
+
+Pipes syntax is:
+
+```
+<div class="movie-copy">
+  <p>
+    {{ model.getValue('copy') | async | uppercase }}
+  </p>
+  <ul>
+    <li>
+      <b>Starring</b>: {{ model.getValue('starring') | async }}
+    </li>
+    <li>
+      <b>Genres</b>: {{ model.getValue('genres') | async }}
+    </li>
+  <ul>
+</div>
+```
+
+