Define menu items for commands defined by plug-in (issue #41)

Issue #41 on GitHub:
  #41

README.md

@@ -18,6 +18,8 @@ When you start Vim with a custom [server name](http://vimdoc.sourceforge.net/htm
 
 The session scripts created by this plug-in are stored in the directory `~/.vim/sessions` (on UNIX) or `~\vimfiles\sessions` (on Windows) but you can change the location by setting `g:session_directory`. If you're curious what the session scripts generated by `session.vim` look like see the [sample below](http://peterodding.com/code/vim/session/#sample_session_script).
 
+If you're still getting to know the plug-in, the "Sessions" menu may help: It contains menu items for most commands defined by the plug-in.
+
 ## Installation
 
 Unzip the most recent [ZIP archive](http://peterodding.com/code/vim/downloads/session.zip) file inside your Vim profile directory (usually this is `~/.vim` on UNIX and `%USERPROFILE%\vimfiles` on Windows), restart Vim and execute the command `:helptags ~/.vim/doc` (use `:helptags ~\vimfiles\doc` instead on Windows). After you restart Vim the following commands will be available to you:

autoload/xolox/session.vim

@@ -1,9 +1,9 @@
 " Vim script
 " Author: Peter Odding
-" Last Change: May 6, 2013
+" Last Change: May 12, 2013
 " URL: http://peterodding.com/code/vim/session/
 
-let g:xolox#session#version = '2.0'
+let g:xolox#session#version = '2.1'
 
 call xolox#misc#compat#check('session', 2)
 

doc/session.txt

@@ -80,6 +80,9 @@ change the location by setting |g:session_directory|. If you're curious what
 the session scripts generated by 'session.vim' look like see the sample below
 [3].
 
+If you're still getting to know the plug-in, the "Sessions" menu may help: It
+contains menu items for most commands defined by the plug-in.
+
 ===============================================================================
                                                           *session-installation*
 Installation ~

plugin/session.vim

@@ -1,6 +1,6 @@
 " Vim script
 " Author: Peter Odding
-" Last Change: May 6, 2013
+" Last Change: May 12, 2013
 " URL: http://peterodding.com/code/vim/session/
 
 " Support for automatic update using the GLVS plug-in.
@@ -95,6 +95,20 @@ if filewritable(s:directory) != 2
 endif
 unlet s:directory
 
+" Define menu items to make the plug-in more accessible.
+amenu 400.10 &Sessions.&Open\ session\.\.\.<Tab>:OpenSession :OpenSession<CR>
+amenu 400.20 &Sessions.&Save\ session\.\.\.<Tab>:SaveSession :SaveSession<CR>
+amenu 400.30 &Sessions.&Close\ session\.\.\.<Tab>:CloseSession :CloseSession<CR>
+amenu 400.40 &Sessions.&Delete\ session\.\.\.<Tab>:DeleteSession :DeleteSession<CR>
+amenu 400.50 &Sessions.&View\ session\.\.\.<Tab>:ViewSession :ViewSession<CR>
+amenu 400.60 &Sessions.-Sep1- :
+amenu 400.70 &Sessions.Open\ tab\ session\.\.\.<Tab>:OpenTabSession :OpenTabSession<CR>
+amenu 400.80 &Sessions.&Append\ tab\ session\.\.\.<Tab>:AppendTabSession :AppendTabSession<CR>
+amenu 400.90 &Sessions.Save\ tab\ session\.\.\.<Tab>:SaveTabSession :SaveTabSession<CR>
+amenu 400.100 &Sessions.Close\ tab\ session\.\.\.<Tab>:CloseTabSession :CloseTabSession<CR>
+amenu 400.110 &Sessions.-Sep2- :
+amenu 400.120 &Sessions.&Restart\ Vim\.\.\.<Tab>:RestartVim :RestartVim<CR>
+
 " Define automatic commands for automatic session management.
 augroup PluginSession
   autocmd!