Py-tlsh

- Fixed bug introduced by commit 1a8f1c581c8b988ced683ff8e0a0f9c574058df4 which caused a different hash value to be generated if there were multiple calls to `Tlsh::update` as opposed to a single call.

- Made the minimum data length = 256 for the C version.
This was reduced in version 3.5.0 to 50 bytes (the force option)

- Pickup fix to `hash_py()` in `py_ext/tlshmodule.cpp` (commit da5370bcfdd40dd6a33c877ee87fe3866188cf2d).

- Add Visual Studio 2005 and 2008 project and solution files to enable build on Windows environment.
- Added files `WinFunctions.h` and `WinFunctions.cpp` to handle code changes needed for Windows build.
- Modified several unit test expected output files to remove error messages, to allow the running of unit tests on Windows under Cygwin. This was caused by the opposite order in which stdout and stderr are written when stderr is redirected to stdout as 2>&1. Also modified `test.sh` to write stderr to `/dev/null`.
- Move `rand_tags` executable from tlsh_forest project to tlsh, to reduce the dependencies of the tlsh ROC analysis project, which depends upon `tlsh_unittest` and `rand_tags`.
- Remove `simple_unittest` and `tlsh_version` from bin directory as these executables are for internal testing and source code documentation, and do not need to be exported.
- Add -version flag to `tlsh_unittest` to get the version of the tlsh library.

- Updated `tlsh_util.h`, `tlsh_impl.cpp`, `tlsh_util.cpp` on checksum.
- Updated `destroy_refersh_exp.sh` and Testing/exp results.

- Updated the Testing/exp expected results.
- Created a script to ease the creation of the Testing/exp expected results.