Made the following changes so the visual studio solution file builds:

* file lyra2.c needed some vs specific casting changes
* removed the inline keywords from sponge.c for VS 2013 compatability
* added lyra2.c,lyra2re.c, and sponge.c to project solution under sgminer/source files/algorithm
* added lyra2.h,lyra2re.h, and sponge.h to project solution under sgminer/header files/algorithm
* updated vs solution file to include lyra,lyra2re files