+ routing: add `filter`/`hfilter` to `Directive`
= routing: transform require/hrequire

transforming require and hrequire to use filter and hfilter, remove duplicated code
= http: fix relative URI resolution, fixes #740
+ can: add `spray.can.{client,server}.ssl-tracing` flag to turn on SslTlsSupport DEBUG logging, fixes #750
Merge pull request #758 from jrudolph/i/750/ssl-tracing-flag

+ can: add `spray.can.{client,server}.ssl-tracing` flag to turn on SslTlsSupport DEBUG logging, fixes #750
Merge pull request #757 from jrudolph/i/740/fix-uri-resolution

= http: fix relative URI resolution, fixes #740
= examples: fix incorrect dtd reference
= routing: change internal behaviour of `host` with regex function
Merge pull request #759 from tootedom/master

fix incorrect dtd reference, and make servlet 3
Merge pull request #755 from bthuillier/hfilter

+ routing: add filter and hfilter to directive
+ routing: add missing support for RequiredValueReceptacles in formField and anyParam directives, fixes #754
Merge pull request #761 from jrudolph/i/754/require-form-field-values

+ routing: add missing support for RequiredValueReceptacles in formField and anyParam directives, fixes #754
= routing: mark RoutingSpec `abstract`
Merge branch 'master' of github.com:spray/spray