Scrubbed old format. Lightened up paging section and focus more on "next"/"prev" hypermedia controls and their benefit. Moved several sections under one top level section called "Customizing Spring Data REST". Cleaned up index.adoc to match the style of Spring Data JPA. Removed JSONP section.
Remove embedded entity operations, based on old spring-data-rest-compact media type. Utilized relative leveloffset for each include. Corrected some ALPS mistakes.
Original pull request: #162.
