Reorganize guides
Remove duplicated link to EC2 User Guide
Remove reference to deprecated img_mad guide
Change table to list in api reference
Replace ugly ascii char
Fix invalid format in manage_acl guide
Fix invalid format in firewall guide
Fix multiple invalid format issues:

- administration/storage/ceph_ds.rst
- administration/storage/lvm_ds.rst
- administration/storage/vmware_ds.rst
- design_and_installation/getting_started/intro.rst