Mention aliases

Signed-off-by: jolheiser <john.olheiser@gmail.com>

README.md

@@ -43,6 +43,28 @@ func main() {
 
 ```
 
+## Aliases
+
+While the stdlib doesn't directly support flag aliases, this library allows for neater generation using a special syntax.
+
+```go
+package main
+
+import "flag"
+
+func main() {
+	fs := flag.NewFlagSet("myapp", flag.ExitOnError)
+	stringFlag := fs.String("string", "", "String flag")
+	fs.StringVar(stringFlag, "s", *stringFlag, "--string")
+}
+```
+In the above code, a second flag was registered with the special `Usage` that simply declared what the long-form flag name was.  
+In this scenario, `ffmd` will generate docs similar to 
+```text
+--string,-s
+```
+See the [example](examples/alias).
+
 ## License
 
 [MIT](LICENSE)

examples/README.md

@@ -6,3 +6,4 @@ generated docs.
 - [flagset](flagset) - Using only stdlib `flag.FlagSet`
 - [single](single) - Using a single `ffcli.Command`
 - [multiple](multiple) - Using `ffcli.Command` with multiple sub-commands
+- [alias](alias) - Using `ffcli.Command` with alias setup