Added compiled external libraries (not everything  is there  - some mips64 libs are missing - compiled from master branch - will update the external library pointers accordingly)
Modifeid Makefiles to get 64-bit architectures - all64 not used yet

Modified Java code to use longs for the variables which store pointers, rather than int
Modifed C++ code to use longs rather than ints for pointers shared between java