Fix lib so 3 unit tests work.

Tests are:
ActivityProfileTest()
GetStatementsTest()
StoreStatementsTest()
Merge pull request #6 from RusticiSoftware/fix/getAndSetStatements

Fix lib so 3 unit tests work.
Updating solution and projects to use VS 2010 format
Moving model, json conversion, and related support functionality to the new TinCanAPILibrary project. This project is intended to serve as a common library for functionality that may be used by either an XAPI client or an XAPI LRS
Moving client-specific models to the client library. Removing nonstandard spaces from Model0.90 directory names.
Switching to use dev-platform-agnostic testing framework, NUnit.  Non-running tests have been updated to be explicitly ignored rather than simply commented out.
Add unit test project for common library.
Renaming client-specific test project for (slightly improved) consistency.
Merging upstream fixes to a few tests.