Moved some modules and added documentation

main.rkt

@@ -1,25 +1,25 @@
 #lang racket/base
 
-(require "private/racket-webview-downloader.rkt")
-(require "private/racket-webview.rkt")
-(require "private/wv-context.rkt")
-(require "private/wv-window.rkt")
-(require "private/wv-dialog.rkt")
-(require "private/wv-element.rkt")
-(require "private/wv-input.rkt")
-(require "private/rgba.rkt")
-(require "private/mimetypes.rkt")
-(require "private/menu.rkt")
+(require "racket-webview-downloader.rkt")
+(require "racket-webview.rkt")
+(require "wv-context.rkt")
+(require "wv-window.rkt")
+(require "wv-dialog.rkt")
+(require "wv-element.rkt")
+(require "wv-input.rkt")
+(require "rgba.rkt")
+(require "mimetypes.rkt")
+(require "menu.rkt")
 
-(provide (all-from-out "private/wv-context.rkt"
-                       "private/wv-window.rkt"
-                       "private/wv-dialog.rkt"
-                       "private/wv-element.rkt"
-                       "private/wv-input.rkt"
-                       "private/rgba.rkt"
-                       "private/mimetypes.rkt"
-                       "private/menu.rkt"
-                       "private/racket-webview-downloader.rkt"
+(provide (all-from-out "wv-context.rkt"
+                       "wv-window.rkt"
+                       "wv-dialog.rkt"
+                       "wv-element.rkt"
+                       "wv-input.rkt"
+                       "rgba.rkt"
+                       "mimetypes.rkt"
+                       "menu.rkt"
+                       "racket-webview-downloader.rkt"
                        )
          webview-set-loglevel
          webview-version