Add InstallGuid and repository files.
Merge branch 'master' of git://github.com/axsh/openvnet into rpm-install-environment
The mistake in a text was corrected.
The mistake in spelling was corrected.
Proof read the install guide and made several corrections
Merge pull request #156 from axsh/rpm-install-guide

Add InstallGuide.md and openvnet.repo and openvnet-third-party.repo.