Add spatial tutorial from service point of view.
Add fulltext tutorial from service point of view.
Remove information on connecting from fulltext and spatial tutorials.
Add simple overview of how to connect with SQL to the service.
Add simple text on connecting with curl.
Add nested result set for service tutorial.
Add simple docs on reading and writing entities.
Merge pull request #45 from akiban/service

Some doc updates to reflect the Akiban service.