[boost] Infinite precision integer

Currently I'm working for LWG on a spec for tr2 for an infinite precision integer, which is almost finished. When it is finished I will put it here for you all to read and comment. Also I have a C++ implementation that will be submitted to boost some time. It will be a version that is pure C++, but that can also link in assembler code for performance. Currently I have the assembler for 32-bit x86 processors using MMX/SSE. The implementation compiles with Borland C++ Builder, Visual C++ and Gnu C++, with matching assemblers. Assembler speeds up the implementation considerably. So my implementation should bring together the best of C++ and assembler. Regards, Maarten.