fix some URLs, internal links, fix un visible tables

fix some URLs, internal links, fix un visible tables
also rename package reference to 4.3.

```
pdion-mbook-3:cloudstack-docs-install pdion$ sphinx-build -b html source build
Running Sphinx v1.2.2
loading pickled environment... done
building [html]: targets for 1 source files that are out of date
updating environment: 0 added, 1 changed, 0 removed
reading sources... [100%] configuration                                                                                                                                             
looking for now-outdated files... none found
pickling environment... done
checking consistency... /Users/pdion/Documents/cloudstack/cloudstack-docs-install/source/managing_networks.rst:: WARNING: document isn't included in any toctree
done
preparing documents... done
writing output... [100%] index                                                                                                                                                      
writing additional files... genindex search
copying images... [100%] ./_static/images/add-cluster.png                                                                                                                           
copying static files... done
copying extra files... done
dumping search index... done
dumping object inventory... done
build succeeded, 1 warning.
```