OGM-229 Create a new chapter about datastore provider with 1 file per DSP

Transfer the MongoDB configuration section (4.5) to the specific MongoDB document file
OGM-135 Update configuration info and add details in the datastore provider chapter
OGM-229 Minor documentation improvements: fix some spelling cases and typos
OGM-229 Documentation improvements: some proposals
Update readme with option to only build html doc
OGM-229 Add the mongodb version number into the documentation variables
OGM-229 Reorganize the configuration documentation by using a table
OGM-229 Add some documentation to describe how entities are stored
OGM-229 Add some documentation to describe how associations are stored
OGM-229 Unify JSON representation
OGM-229 Get rid of the default column for configuration

Include information info the description
OGM-229 Change some phrasing and add introduction elements when due

Unfortunately the original file was not respecting the style so all changes
appear global.
OGM-237 Update assembly definition to lastest project changes
OGM-237 Exclude temporary files from the sources bundled in the distribution
OGM-237 Update assembly definition to include Infinispan integration
OGM-237 Include the Ehcache integration in the distribution assembly
OGM-237 Move section for better readability
OGM-237 Include MongoDB module in the distribution assembly
OGM-238 Update to Infinispan 5.1.7.Final
OGM-239 Update to Hibernate Search 4.2.0.Beta1