Merge pull request #43 from larsssono/master

Wiki api according to C4
Remove usage of tempfile.mkstemp because it was too easy to leave open file handles laying around.
Use binary mode for streaming files to and from the repo.
Patch conversion to and from Unix epoch timestamps.
better handling of file URLs
fixed bug in _uploadToFileHandleService and added tests
invert quotes in test of command line client to appease Windows
reorganized tests
ACL tests depend on an existing user. Validate that the user exists.
Merge pull request #44 from cbare/develop

Reorganize tests and fix Windows bugs
Gets filehandle from entity to not fail when not owner of entity.