Initialize shared gh-pages infrastructure
Remove 'not found in _includes' hacks

Remove the use if "unless contains 'not found in _includes directory'"
hacks that were previously used to detect when _includes were missing.

This change is required as the hack no longer works with the latest
Jekyll release (and therefore also with GitHub).

Additional 'custom_pom_template' and 'custom_gradle_template' flags
must now be set in _config.yml if you want to include a custom pom.xml
or build.gradle file.
Add project page
Update repo URLs
Add box pointing to the Spring Data REST module.
Added Spring Data Cassandra to the community modules.
Shrunk height of the project boxes to 100px.
Added anchors for main and community projects.
Activate Spring Data Cassandra homepage.
Point to new Spring Data Couchbase home.