cherrypicked a01940fac58d397b384b709631921810d95606cd Merge pull request #639 from ahgittin/fix/addChild-with-spec-on-interface onto 0.5
Merge pull request #686 from andreaturli/0.5

cherrypicked a01940fac58d397b384b709631921810d95606cd
Fix SshMachineLocationTest reference to README file
Merge pull request #688 from grkvlt/0.5-test-readme-location

Fix SshMachineLocationTest reference to README file
Significant updates to download page. Better flow, both for noobs and pros, with  links to PGP and SHA1 resources.

Conflicts:
	docs/start/download.md
Tweaked maven anything-url-search field. Removed dup "AND AND" bool modifier.
Source: {Maven|Sonatype} links to anything search, rather than dist search.
added html file extension for the release-notes
Added verify page for checksums and keys
Merge pull request #689 from grkvlt/0.5-download-page-simplification

Download page simplification