Move release notes (as versioning not required in directory). Added known issues page.
Removed redundant release notes folder.

TODO: Find a way to list release notes from all previous releases.
minor logging fixes
extend timeout for integration test (http latency detector)
extend timeout for integration test (http latency detector)
Tweaked Workaround and Fix descriptions.
Merge pull request #606 from jdtoy/readme-knownissues

Docs: Move release notes, add known issues.
Merge branch 'master' into 0.5
Merge branch '0.5' into 0.5.0-rc.1