find-controller: remove pointer alias
web-view: define readers
web-view: remove pointer alias
web-view: define web-context and zoom-level properties
web-view: remove constructors in favour of make-instance
web-context: remove pointer alias
cookie-manager: remove pointer alias
Remove -class suffix from webkit classes
cookie-manager: delete enum wrappers

These are not needed; use the enum :keywords
directly.
cookie-manager: remove what appears to be a bogus binding

not in the upstream API docs, refers to g-type initialiser,
from the looks of it.
web-context: remove enum wrappers