add index pages for documentations

doc/controllers/IndexController.lua

@@ -1,10 +1,23 @@
 BaseController:subclass("IndexController")
 
 function IndexController:index(...)
+    local file = io.open("/home/mrsang/doc/library.md", "r")
+    if file then
+        local content = ""
+        local md = require("md")
+        local callback = function(s) content = content .. s end
+        md.to_html(file:read("*a"), callback)
+        file.close()
+        self.template:set("data", content)
+    end
     return true
 end
 
 function IndexController:actionnotfound(...)
-    self.template:setView("index")
-    return self:index(table.unpack({...}))
+    self.template:setView("book")
+    return self:book(table.unpack({...}))
+end
+
+function IndexController:book(...)
+    return true
 end

doc/controllers/doccontroller.lua

@@ -171,7 +171,7 @@ function DocController:index(...)
         content, has_3d = post_process_md(content, self)
         -- replace some display plugins
 
-        self.template:setView("index", "index")
+        self.template:setView("book", "index")
         self.template:set("data", content)
         self.template:set("has_3d", has_3d)
     else