Making DALi core internals typesafe using guaranteed types; uint8_t, uint32_t and...

Making DALi core internals typesafe using guaranteed types; uint8_t, uint32_t and enabling -Wconversion

unsigned char  -> uint8_t
unsigned short -> uint16_t
unsigned int   -> uint32_t
int            -> int32_t
-Wconversion will prevent any implicit conversions where precision may be lost such as: uint32_t a = (size_t)b or int x = (float)y
static_cast has to be used to tell the compiler how and where to do the conversion

Change-Id: Ic1475a59acf55601100cd603a455b96e9eb7c53e