Update README.md
Update README.md
Sync with master branch and take out troubleshooting in a separate section.
Merge branch 'doc_install_guide' of github.com:akeneo/MagentoConnectorBundle into doc_install_guide

Conflicts:
	README.md
Update installation procedure.
Remove duplicate.
Start User Guide.
Finishing User Guide.
Update README
README.md update.
README.md update.
Merge branch 'master' into doc_install_guide

Conflicts:
	README.md
Merge pull request #309 from akeneo/doc_install_guide

Doc install guide