Few small changes, added Windows makefile, LICENSE

Code is licensed under the MPLv2. Changed the makefile to, by
default, optimize to level 3. make debug will remove optimization
and add gdb debugging symbols, which slows output down quite
a bit. Removed an assertion leftover from bug squashing.

Spigot.cpp

@@ -42,7 +42,6 @@ void Spigot::pump(void) {
                 std::cout << this->preDigits.back() << std::flush;
                 this->preDigits.pop_back();
             }
-            assert(this->preDigits.size() == 0);
             this->preDigits.insert(this->preDigits.begin(), tempPreDigit);
 
         } else if(tempPreDigit == 9) {