docs: add "spray-M8-released" blog post, smaller improvements
site: small fix for blog URIs
sbt: bump version to 1.1-SNAPSHOT
site: tweak logging levels
httpx: uncomment commented out test
sbt; remove ls-sbt
docs & site: update for 1.0-M8.1, smaller fixes
routing: add another ParameterDirectives test
http: fix cookie parser not accepting space chars in path or extension, relax cookie attribute matching to be case-insensitive
routing: add headerValueByName(Symbol) and optionalHeaderValueByName(Symbol) overload
docs: restructure Project Info chapters, add "External Resources" chapter, closes #250, #192
docs: restructure Introduction chapters, add getting-started, closes #74
docs: add pointer to new getting-started chapter, close #159
Merge remote-tracking branch 'origin/master'

Conflicts:
	docs/project-info/contributing.rst
	site/src/main/resources/sphinx/json/documentation-1.0-M8.1/index.fjson
	site/src/main/resources/sphinx/json/documentation-1.0-M8.1/spray-caching/index.fjson
	site/src/main/resources/sphinx/json/documentation-1.0-M8.1/spray-can/dependencies.fjson
	site/src/main/resources/sphinx/json/documentation-1.0-M8.1/spray-client/index.fjson
	site/src/main/resources/sphinx/json/documentation-1.0-M8.1/spray-http/index.fjson
	site/src/main/resources/sphinx/json/documentation-1.0-M8.1/spray-httpx/dependencies.fjson
	site/src/main/resources/sphinx/json/documentation-1.0-M8.1/spray-routing/dependencies.fjson
	site/src/main/resources/sphinx/json/documentation-1.0-M8.1/spray-routing/getting-started.fjson
	site/src/main/resources/sphinx/json/documentation-1.0-M8.1/spray-servlet/index.fjson
	site/src/main/resources/sphinx/json/documentation-1.0-M8.1/spray-testkit/index.fjson
	site/src/main/resources/sphinx/json/documentation-1.0-M8.1/spray-util/index.fjson
	site/src/main/resources/sphinx/json/documentation-1.2-M8/index.fjson
	site/src/main/resources/sphinx/json/documentation-1.2-M8/spray-caching/index.fjson
	site/src/main/resources/sphinx/json/documentation-1.2-M8/spray-http/index.fjson
	site/src/main/resources/sphinx/json/documentation-1.2-M8/spray-testkit/index.fjson
	site/src/main/resources/sphinx/json/documentation-1.2-M8/spray-util/index.fjson
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'origin/master'
Initial addition for OAuth support with an example in use with Google or Facebook.