Does a lot of work towards the PIT

Added a math library, with clamp and POW.
added printf support for printing doubles
added a few helper functions in PIT for calcaulting the time in seconds of a clock cycle based on divisor

libc/include/stdlib.h

@@ -20,5 +20,7 @@ char* u8toa(uint8_t num, char* buf, int base);
 char* itoa(int num, char* buf, int base);
 char* utoa(unsigned int num, char* buf, int base);
 
+char* dtoa(double n, char* buf, int afterpoint);
+
 
 #endif