change order of includes to fix compile error
moved callbacks/dummy_callbacks.hpp to third_party/tapkee
moved callbacks/eigen_callbacks.hpp to third_party/tapkee
moved callbacks/neighbor_callbacks.hpp to third_party/tapkee
moved callbacks/pimpl_callbacks.hpp to third_party/tapkee
moved callbacks/precomputed_callbacks.hpp to third_party/tapkee
moved chain_interface.hpp to third_party/tapkee
moved defines.hpp to third_party/tapkee
moved defines/eigen3.hpp to third_party/tapkee
moved defines/keywords.hpp to third_party/tapkee
moved defines/methods.hpp to third_party/tapkee
moved defines/random.hpp to third_party/tapkee
moved defines/stdtypes.hpp to third_party/tapkee
moved defines/synonyms.hpp to third_party/tapkee
moved defines/types.hpp to third_party/tapkee
moved embed.hpp to third_party/tapkee
moved exceptions.hpp to third_party/tapkee
moved external/barnes_hut_sne/quadtree.hpp to third_party/tapkee
moved external/barnes_hut_sne/tsne.hpp to third_party/tapkee
moved external/barnes_hut_sne/vptree.hpp to third_party/tapkee