filterfiles: Search as long as the target is a prefix of current. filterfiles was failing to find files for directory arguments if another file existed that started with the directory name and sorted earlier. For example, a manifest of ('foo.h', 'foo/foo') would cause filterfiles('foo') to return nothing. This resolves issue #294.

remove duplicate code.

Fixed conditional include of stdint.h for windows/msvc6/python2.3 environment.

Fix hg diff regression

add tests for push over http.

fix -I/-X when relative paths used or in subdir