Update README.md

Author: doublefint

README.md

@@ -1,5 +1,15 @@
 # all.udl
 Export/Import all sources in UDL format for ISC Caché 2016
 
-## Installation
-NS> s ^%SYS("SourceControlClass", $namespace ) = "sc.all"
+## Setup working directory ( optional )
+```
+NS> w ##class(sc.all).workdir("/path/to/your/working/directory/")
+```
+## Export to working directory:
+```
+NS> d ##class(sc.all).export()
+```
+## Import:
+```
+NS> d ##class(sc.all).import()
+```