Suggest using Scala class in ScalaTemplates.md
fix problem with headers getting first 2 bytes dropped on some http client such as MS.net http client
Add filter method to promise
Remove use of upper-bounded wildcard types in Promise.sequence
Merge pull request #2412 from pvlugter/promise-filter

Add Promise.filter
Fix onHandlerNotFound not receiving requests modified by upstream filters
Merge pull request #2413 from pvlugter/promise-sequence

Fix Promise.sequence
Merge pull request #2403 from mkiedys/doc

Suggest using Scala class in ScalaTemplates.md
Merge pull request #2276 from jkyamog/master

First 2 bytes of http headers getting dropped on some http client
Merge pull request #2231 from bbarkley/master

Fix onHandlerNotFound not receiving requests modified by upstream filter...
Merge remote-tracking branch: upstream/master