* Fix JSDoc type resolution
Breaks type parameter resolution that is looked up through prototype
methods, though. I need to fix that still.
* Check for prototype method assignments first
* Undo dedupe changes to getJSDocTags
* JS Type aliases can't refer to host type params
Previously, js type aliases (@typedef and @callback) could refer to
type paremeters defined in @template tags in a *different* jsdoc tag, as
long as both tags were hosted on the same signature.
* Reduce dedupe changes+update baseline
The only reason I had undone them was to merge successfully with an
older state of master.
