remove dependency on bst
chg size_t to uint64_t
change omp loop var to bst_omp_uint, add XGB_DLL to wrapper
chg r package path back
add omp uint when openmp is not there
minor fix, add openmp
change uint64_t to depend on utils
change uint64_t to ulong, to make mac happy, this is final change
bst_ulong supported by sparsematrix builder
Merge branch 'master' into unity

Conflicts:
	src/learner/evaluation-inl.hpp
	wrapper/xgboost_R.cpp
	wrapper/xgboost_wrapper.cpp
	wrapper/xgboost_wrapper.h