Update README.md

README.md

@@ -2,10 +2,18 @@
 
 Official filter and tag add-ons for [pongo2](https://github.com/flosch/pongo2). Uses 3rd-party-libraries.
 
+## How to install
+
+Simply add the following import line **after** importing pongo2:
+
+    _ "github.com/flosch/pongo2-addons"
+
+All filters/tags will be registered automatically.
+
 ## Filters
 
   - **markdown** (parses markdown text and outputs HTML; **hint**: use the **safe**-filter to make the output not being escaped)
 
 ## Tags
 
-(nothing yet)
+(nothing yet)