Stricter auto-hyperlinking
Stricter auto-hyperlinking

No longer links: xxxwww.foo.bar
No longer links: $.www.foo.bar
No longer links multiple punctuation at end: www.foo.bar???

Resolves #352 (though tweaks will no doubt be made for years as more edge cases are found)

google/CodeCity,google/CodeCity,google/CodeCity,NeilFraser/CodeCity,NeilFraser/CodeCity,google/CodeCity,NeilFraser/CodeCity,NeilFraser/CodeCity