add graph-easy dependency

README.md

@@ -2,6 +2,11 @@ These setup files provide the text-only configurations for DMZ.
 
 *It should not contain private data.*
 
+# Dependencies
+
+- `recutils`
+- (optional) `graph-easy` (the package may be called `perl-graph-easy`)
+
 # Aspirations
 
 - Each service should reside in its own directory.
@@ -18,7 +23,7 @@ These setup files provide the text-only configurations for DMZ.
 # Network Database
 
 I have a half-baked plan to finally make use of plain-text databases, and it's already half-working.
-Install `recutils` and try these commands:
+Try these commands:
 
 Ask what types of _rec_ords it contains: