Merge pull request #257 from hseeberger/master

Improve .gitignore, in particular exclude Eclipse project files
routing: improve PathDirectivesSpec
can: fix MatchError in HttpHostConnector
routing: flexibilize route `|` operator and recover modifiers
docs: update references page with comment from Metafor Software
http: small improvement in Scaladoc.
util: actively close underlying InputStream in PimpedInputStream.toByteArrayStream
echo-server example: extend with ACKED mode
Once more improve echo-server example
docs: update references page with comment from Timetrade
can: fix request-level API not using encryption for HTTPS requests
routing: add support for `RejectionError`s, closes #259
routing: small cleanup in RequestContext
Stop TcpConnection on handler termination (closes #261)