json-cpp Code

- fixed SCons build on Windows: only build static library (support static/dynamic at the same time requires significant changes)
- renamed SCons glob tool to globtool to avoid clash with python glob module. This prevented running the tests.
- check target now works with SCons 1.x

Fixing string index issue when checking for control characters

Fixed default constructor initialization.

Fixed bug introduced by utf-8 patch with fix provided by Henry Ludemann. All unit tests are now passing.

Added patch for mingw from Sebastien Vincent

Implementing support for reading and writing Unicode escape sequences.

Patch from Sebastien Vincent

Added cstring for memcpy(), as suggested by sebastien.vincent@... . This allows gcc-4 to compile. Removed doxygen from SConstruct, since it is now broken; I have been unable to get it to work with either scons 0.97 or scons 2.1; hopefully someone else can get that working again.

- Added basic string test (all char in ASCII range 33-126) and a large string test.

Forgot to add # to %g modifier for sprintf in valueToString for floats. Otherwise no decimal point appears when only zeroes would follow, which changes the type to integer.