Move Developer Guide to Infinispan Embedded Guide

There is currently confusion around infinispan developer guide and the infinispan java client guide.

Infinispan Developer guide is originally a guide for embedded infinispan. This guide evolved over time and included sections of infinispan remote. Then the hot rod client guide was born. however, the developer guide contains some parts of the java client (RemoteCache) that are not in the java client guide, and viceversa. 

The Developers guide is mostly Infinispan Embedded guide and this leads to a lot of confusion.

Let's get rid of the bad named guide "Developer Guide". Let's have the client server guides (Server Guide + Java Client Guide + other clients guides), move all the remote stuff from the developers guide to java client guide and rename developers guide to Infinispan Embedded Guide.