News in 0.0.6
-------------
* Rename GgitDiff to GgitDiffList
* Bind GgitMergeTreeOptions
* Added ggit_diff_patch_to_stream
* Added writing blob using output stream
* Bind more index API (write_tree, add_bypath, owner)
* Rename FILEMODE constants to FILE_MODE
* Bind create_commit
* Bind ggit_message_prettify
* Bind get_patch and patch_to_string
* Added new status options
* Added ggit_index_entry_stat
* Added _set API for GgitIndexEntry
* Bind tree builder API
* Misc bugfixing