Fix for Wp8/Winrt File class
FileHandle class (Cooper)
FileHandle class (Echoes)
FileHandle class (WP8/WinRT)
FileHandle class (Nougat)
Convert FileHandle class to mapped class
More methods for FileHandle class
Unit tests for FileHandle class
Fix for zero read/write in FileHandle
New FromFile method for FileHandle
New FileUtils class
File class reworked
Change XmlDocument to use new FileHandle class
Unit tests for FileUtils class
Update unit tests to reflect changes in IO