Add PathUtilities.SelectFileInExplorer method

Add a new method that allows to select a file in Windows Explorer
or on Linux opens the containing directory in Nautilus.

Change-Id: I72c0500da79a27921cbb9491e794a6a9cb94c05d
Merge pull request #102 from ermshiperete/AddSelectFileMethod

Add PathUtilities.SelectFileInExplorer method