[MERGE] BEncode Pyrex, pt 4

[Alexander Belchenko]

bb:resubmit

C:\work\Bazaar\mydev.packs\bencode>setup.py build_ext -i --allow-python-fallback
running build_ext
pyrexc bzrlib/_bencode_c.pyx --> bzrlib/_bencode_c.c
C:\work\Bazaar\mydev.packs\bencode\bzrlib/_bencode_c.pyx:107:15: Expected an identifier or literal
building 'bzrlib._bencode_c' extension
c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\bin\cl.exe /c /nologo /Ox /MD /W3 /GX
/DNDEBUG -DWIN32 -IC:\P
ython25\include -IC:\Python25\PC /Tcbzrlib/_bencode_c.c
/Fobuild\temp.win32-2.5\Release\bzrlib/_bencode_c.obj
_bencode_c.c
c1 : fatal error C1083: Cannot open source file: 'bzrlib/_bencode_c.c': No such file or directory