vim-patch:7.4.483

Problem:    A 0x80 byte is not handled correctly in abbreviations.
Solution:   Unescape special characters. Add a test. (Christian Brabandt)

https://code.google.com/p/vim/source/detail?r=v7-4-483
vim-patch:7.4.485

Problem:    Abbreviations don't work. (Toothpik)
Solution:   Move the length computation inside the for loop.  Compare against
	    the unescaped key.

https://code.google.com/p/vim/source/detail?r=v7-4-485
vim-patch:7.4.488

Problem:    test_mapping fails for some people.
Solution:   Set the 'encoding' option. (Ken Takata)

https://code.google.com/p/vim/source/detail?r=v7-4-488
Merge pull request #1722 from fwalch/vim-7.4.488

vim-patch:7.4.483, vim-patch:7.4.485, vim-patch:7.4.488