update nsi install scripts
update swig batch files for c#
regen swig for 2.0.9
demo csharp app
Import OTStorage.h into swig directly.

No functionality changes, the correct parts of OTStorage.h
are automatically selected with macros.  The output code is the same,
except for one additional function that is now generated.
remove unused code from OTAPI.i
fix csharp demo project
Fixed Path Bug.  Now Update Prefix Path Correctly
more stuff in the csharp demo project
Pid code now within private 'Pid' class

Now store the pid-file location, makes clean-up more reliable.
This is in preparation for the pid callback for swig.
Merge pull request #179 from da2ce7/master

C# Demo for Windows, PidFile Updates, Swig Updates