vim-patch:7.4.408

Problem:    Visual block insert breaks a multi-byte character.
Solution:   Calculate the position properly. (Yasuhiro Matsumoto)

https://code.google.com/p/vim/source/detail?r=v7-4-408
Merge pull request #1280 from splinterofchaos/visual-mb

vim-patch:7.4.408
vim-patch:7.4.414

Problem:    Cannot define a command only when it's used.
Solution:   Add the CmdUndefined autocommand event. (partly by Yasuhiro
            Matsumoto)

https://code.google.com/p/vim/source/detail?r=v7-4-414
Fix fileio.c's diagram.