Remove workarounds and fix hyperlinks that were preventing docs from building.
Add Creating Network Offerings section to fix broken cross-reference that prevented docs from building. This section was already in the repo, but was not previously included in any book file. Removed stray reference to obsolete version number.
Doc. CLOUDSTACK-1152. Restore missing half of paragraph in Adding a Host.
CLOUDSTACK-446 : Host going to alert state, if you are adding already added host
Adding an already added host fails with error but in the process incorrectly updates the status of the host to 'Alert'. Put a check to prevent this.