docs(generators:filter): create filter.md

Awk34 · Awk34 · commit da34dee2a48d · 2016-05-13T14:23:01.000-04:00
[skip ci]
diff --git a/docs/generators/filter.md b/docs/generators/filter.md
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+### Filter
+Generates a filter.
+
+Example:
+```bash
+yo angular-fullstack:filter myFilter
+[?] Where would you like to create this filter? client/app/
+```
+
+Produces:
+
+    client/app/myFilter/myFilter.filter.js
+    client/app/myFilter/myFilter.filter.spec.js
