Remove uses of nceg operators from std.math
Merge pull request #1725 from yebblies/nceg

Remove uses of nceg operators from std.math
CTFE bug 9634 was fixed, remove the workaround
Modernize syntax: template(T)+enum --> enum(T) etc.
Turn the venerable alias A B; to alias B = A;
ctRegex is no experiment anymore
Merge pull request #1732 from blackwhale/revert-wa-regex

[TRIVIAL] CTFE bug 9634 was fixed, remove the workaround
Merge pull request #1733 from blackwhale/nice-templ-regex

Use the new template syntax in std.regex