Moved type definitions; GitOdb; GitOdbObject; GitSignature to pxi
Moved GitObject and subclasses into pxi files
Make makefile easier to read and edit
Moved Config to pxi
Moved GitOid into pxi
Moved Reference and RefLogEntry to pxi
Moved Repository into pxi
Moved GitStatus into pxi
Moved most imports closer to where they belong
Moved config and status earlier in include list
Sort lines in setup.py
Merge pull request #20 from sjagoe/split-cygit2-pyx

Split cygit2 pyx into multiple files for easier maintenance