Update README.md

Author: evshvarov

README.md

@@ -1,6 +1,16 @@
 # cache-udl
 Export/Import sources in UDL format for [ISC Caché 2016.2](http://www.intersystems.com/our-products/cache/cache-overview/)
 
+# Installation
+Download code and run
+```
+do $System.OBJ.ImportDir("/dir/cache-udl","*.xml;*.cls;*.mac;*.int;*.inc;*.dfi","ck",,1)
+```
+or
+import the [release](https://github.com/intersystems-ru/cache-udl/releases) to the namespace.
+
+Map sc package to %All namespace to make it visible in any namespace.
+
 ## Setup working directory ( optional )
 ```
 NS> w ##class(sc.code).workdir("/path/to/your/working/directory/")