Fix CppNetlib find module
Check HUNTER_CMAKE_GENERATOR as default generator
Partially revert dependencies

Dependencies need to set `<LIB>_ROOT` variables to top project (for find_package)
Improve clear-all.sh: can't change UID
CppNetlib depends on ios_sim for Apple
Update OpenSSL: 1.0.1f
Update CppNetlib: 0.10.1-hunter-2
Merge branch 'update' into update.linux