Bump version to 0.6.2
Fix #1654 Improve the introduction to repositories flow.
Merge pull request #1908 from dotcloud/bump_v0.6.2

Bump v0.6.2
Merge remote-tracking branch 'origin/release'
Update VERSION
Merge pull request #1913 from metalivedev/1654-registryexamples

Fix #1654 Improve the introduction to repositories flow.
Docs: remove reference to deprecated 'base' image
Remove many remaining docs references to the deprecated `base` repository and several other minor doc cleanups