Minor README update (mostly a few links).

README.md

@@ -1,25 +1,20 @@
 # authd
 
-authd is a token-based authentication micro-service.
+`authd` is a token-based authentication micro-service based on [libipc][libipc].
 
 > TODO: explain basic concepts behind `authd`.
 
 ## Build
 
 `authd` is written in Crystal.
-You’ll need the following tools:
-
-  - crystal
-  - shards
-  - make
-
-To build authd, run the following commands:
+You’ll need the following tools to build it: `crystal`, `shards` and `make`.
 
 ```
 make
+make install
 ```
 
-## Deployment
+## Run
 
 ```
 $ authd --help
@@ -93,3 +88,7 @@ Some take a *UserID* to identify another user (its number or its login, both are
 Plus, the `admin` boolean value in the `AuthD::User` class.
 
 > TODO: continue explaining design choices.
+
+[libipc]: https://git.baguette.netlib.re/Baguette/libipc
+[dnsmanagerd]: https://git.baguette.netlib.re/Baguette/dnsmanagerd
+[netlibre]: https://netlib.re