* Refactor platform/types.hpp, added some support for x86 32bit types
* Refactor platform/platform.hpp, add #ifdef conditionals to detect x86,
32bit and 64bit arch
* Implement 32bit and 64bit getTimestamp based in assembly rdtsc. For
32bit a struct composed by two 32bit numbers was devised to represent a
ULong data type of 64bits
