Add serve function, update documentation accordingly

Signed-off-by: Izuru Yakumo <yakumo.izuru@chaotic.ninja>

git-svn-id: file:///srv/svn/repo/aya/trunk@61 cec141ff-132a-4243-88a5-ce187bd62f94

aya.1

@@ -16,21 +16,22 @@ Does it need one?
 .It Fast (of course)
 .El
 .Sh USAGE
-.Ss (Re-)build your site.
-.Nm 
-.Cm build
-.Ss (Re-)build one file and prints resulting content to standard output.
+.Bl -tag
+.It build
+(Re-)build a site or a file in particular
+.It serve
+Serve generated site over HTTP
+.It var
+Print a list of variables defined in a given markdown file.
+.It watch
+(Re-)build a site if any file changed
+.Sh HISTORY
 .Nm
-.Cm build
-.Ar <file>
-.Ss (Re-)build your site every time you modify any file.
-.Nm
-.Cm watch
-.Ss Print a list of variables defined in the header of a given markdown file.
-.Nm 
-.Cm var
-.Ar <file>
-.Ar <var1> <var2> ...
+was originally forked from prologic/zs by Izuru
+out of disgust with the latest revision, so he
+used a earlier commit as a base, and then
+eventually reimplemented older features from
+zserge's original project.
 .Sh AUTHORS
 .Nm
 is maintained by Izuru Yakumo