help: Document the archiving flags

The only caveat is the limitations of the man library will not
allow me to write more in-depth documentation of the new flags. Maybe if
I go through refactoring the binary side using clap this will be easier.

build.rs

@@ -62,6 +62,30 @@ fn vento() -> Result<Page> {
                 .long("--undo")
                 .help("Undoes the last action"),
         )
+        .flag(
+            Flag::new()
+                .short("-e")
+                .long("--export-inv")
+                .help("Exports an inventory"),
+        )
+        .flag(
+            Flag::new()
+                .short("-E")
+                .long("--export-dir")
+                .help("Exports the Vento directory"),
+        )
+        .flag(
+            Flag::new()
+                .short("-g")
+                .long("--import-inv")
+                .help("Imports an inventory archive"),
+        )
+        .flag(
+            Flag::new()
+                .short("-G")
+                .long("--import-dir")
+                .help("Imports a Vento directory archive"),
+        )
         .flag(
             Flag::new()
                 .short("-i")

src/help.rs

@@ -30,6 +30,10 @@ pub fn vento() -> Result<()> {
     - {}: Lists files in selected inventory
     - {}: Switches slots
     - {}: Undoes the last action
+    - {}: Exports an inventory
+    - {}: Exports the Vento directory
+    - {}: Imports an inventory archive
+    - {}: Imports a Vento directory archive
     - {}: Initializes Vento
     - {}: Displays this message",
         "Vento".bold().blue(),
@@ -39,6 +43,14 @@ pub fn vento() -> Result<()> {
             .green(),
         "vento ( -c | --switch )".bold().green(),
         "vento ( -u | --undo )".bold().green(),
+        "vento ( -e | --export-inv ) [ slot ] [ output ]"
+            .bold()
+            .green(),
+        "vento ( -E | --export-dir ) [ output ]".bold().green(),
+        "vento ( -g | --import-inv ) [ input ] [ slot ]"
+            .bold()
+            .green(),
+        "vento ( -G | --import-dir ) [ input ]".bold().green(),
         "vento ( -i | --init )".bold().green(),
         "vento ( -h | --help )".bold().green()
     );