change the title in the api pages

fix a link
put the change log in chronological order.
Merge pull request #251 from stupakov/api-page-title-change

change the title in the api pages
Two minor fixes.
Merge pull request #252 from programsam/master

Two minor fixes.
Bosh uses Ubuntu 10.04
Merge pull request #253 from cloudfoundry/ubuntu

Fix: Bosh uses Ubuntu 10.04
Update NFS troubleshooting
Merge pull request #254 from cloudfoundry/nfs

Update NFS troubleshooting
add system diagram of managed services

to help illustrate the relationships between CF, service, service broker, and apps
Merge pull request #255 from stupakov/services-diagram

add system diagram of managed services