Replaced cpplib/ReadMe.txt with English text.

The previous content was automatically generated by VC's project
wizard, so it contained native language's placeholder.

git-svn-id: svn://localhost/gltestplus/branches/bullet@1236 42c370b9-4569-d348-85c3-ab3aefc53057
Made gltestdll project file for VC2012 link with local libraries.

Also removed squirrel.lib from linked static libraries, because we
export the symbols from the executable.
Imported Squirrel 3 source tree because the original project doesn't
publish a VCS repository.
Moved gltestdll project file into VC2008 subdirectory.

Also fixed relative paths to libraries in the project file.
Adjusted VC2008 project files to build with local Squirrel sources.
Added some file ignore patterns.
Made VC2012 project files build with internal squirrel sources.

The configuration with x64 and Debug fails to link with inconsistent
runtime library error, but I cannot find which library is causing it.