weak, soft, and lazy pointers #97

Job	Run time
build-windows (clang-ue3-x86-release)	1m 27s
build-ubuntu (clang-cross-ue3-x86-release)	2m 33s
build-windows (clang-ue4-x64-release)	2m 4s
clang-format	8s
build-ubuntu (clang-cross-ue4-x64-release)	2m 40s
clang-tidy (clang-ue3-x86-release)	7m 50s
build-windows (msvc-ue3-x86-release)	1m 28s
build-ubuntu (llvm-mingw-ue3-x86-release)	34s
build-windows (msvc-ue4-x64-release)	1m 16s
build-ubuntu (llvm-mingw-ue4-x64-release)	43s
spelling	4s
clang-tidy (clang-ue4-x64-release)	8m 14s
build-ubuntu (mingw-ue3-x86-release)	2m 9s
build-ubuntu (mingw-ue4-x64-release)	2m 28s
	33m 38s

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