Made some modifications to premake scripts for compiling on linux
1. Made some changes to the bullet code to get it to compile on ubuntu
2. I have run into a conflicting namespace issue for std on ubuntu for for osg. So I trying to remove the using namespace std; and instead I am replacing all std object references with std:: I am doing this in stages to make sure I do not screw anything up. In this checkin I replaced the references in Stdutils. I compiled and made sure it still worked. I will then work my way up the change of libraries test after each.