code overhaul

Signed-off-by: fbt <fbt@fleshless.org>

README.md

@@ -1,10 +1,22 @@
-sx-open
-=======
+# sx-open
 
 sx-open is an attempt to implement a saner alternative to xdg-open.
 
-Installation
-------------
+## Installation
 
 Clone the repo, drop sx-open.cfg into your $HOME/.config.
 As this thing is meant to replace xdg-open, you will probably want to link sx-open into xdg-open somewhere in your $PATH as to override the default one.
+
+## Usage
+
+	sx-open [-dhv] <uri/file>
+	Flags:
+	  -d   Dry run
+	  -v   Verbose
+	  -h   Help
+
+### Exit codes
+
+ * 1 — action failed
+ * 2 — file not found
+ * 3 — no handlers found