Fix #10 : Does not download data file in tmpdir as expected (instead it is downloaded in the default user Download directory)

Fixed

• #10 : Does not download data file in tmpdir as expected (instead it is downloaded in the default user Download directory). The previous attempt in version 0.1.26 is a failure. The origin of the bug is that we send a relative tmp directory path to Webdriver. Additionally, this path has to be normalized to the runtime OS (using slash or backslash).