Update quickstart-openstack.md
reviewed
Merge branch 'master' into review-terminology
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Merge branch 'patch-4' of https://github.com/natishalom/cloudifysource.github.com
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Merge branch 'patch-4' of https://github.com/natishalom/cloudifysource.github.com into natishalom-patch-4
Tweak @natishalom's pull request
Merge branch 'natishalom-patch-4'
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Merge pull request #102 from cloudify-cosmo/review-terminology

reviewed
OpenStack native + removed OS section
Icon + H2
Align Center
icon
icon resize
Modified guide-blueprint and quickstart links to nodecellar-singlehost
Update installation-cli.md
OpenStack area
HR