CB-2420 [Windows8] honor fileKey and param options. This closes #15
[Windows8] upload uses the provided fileName or the actual fileName
Revert "CB-6928: Implements NOT_MODIFIED check downloading resources."

This reverts commit b7a03c210dc592f2052a45272fd123e77d3d2e67.
Merge remote-tracking branch 'upstream/master'
CB-6928: Handle 304 status code