Implemented more methods from File, Added FileAccess
Added TextWriter and StreamWriter classes, implemented createText in File
Major Changes! See extended description

Moved BluetoothStream and StreamWrapper to special package name
AndroidHelpers which is where any Android specific non .NET stuff should
be placed from here on.

Renamed StreamWrapper to JavaStreamWrapper to better reflect it's
purpose

Moved NetworkStream to System.Net.Sockets to match it's namespace in
.NET

Changes to Stream read design to reflect .NET behavior/design

Implemented StreamReader and TextReader

Added openText method to File