Use pointers instead of int to support 64bit address

[shahakMorag]

Pointers fixes

In the read function you can use ctypes.c_void_p() to support 64bit.
In the readString use ReadProcessMemory use ctypes.c_void_p(lp_base_address) instead lp_base_address.

Improve API

In readByte remove the hex in order to allow to convert it into bytes easier.

Release Pypi of the fixes