Fix some spelling errors.

casese -> cases (1)
chache -> cache (1)
cirucal -> circular (1)
dependecy -> dependency (1)
detrmine -> determine (2)
eavluate -> evaluate (1)
exertnal -> external (1)
ony -> only (1)
registation -> registration (3)
registring -> registering (2)
regsistration -> registration (3)
seperate -> separate (2)
wit -> with (1)
withe -> with (1)

Fix build failure on clang 7 with libc++

Unlike the GNU C++ STL, there's no implicit include for <array> in this
one, apparently.