SES-1674 documentation fix: use begin() instead of setAutoCommit()
set version number to 2.7.0-beta1 (should have been committed before release)
SES-1679 updated to maven site plugin v3.0, using 3.0-compatible config.
SES-1666 syntax tests now all pass, reactivating integration phase
execution.
SES-1680 determination of merged dataset improved: query-defined named
graphs (USING NAMED) should override externally defined named
graphs. 
SES-1666 SES-1680 all approved update tests now pass, integration phase
test execution for sparql update tests reactivated
SES-1678 fix for case of inverted path sequence of exactly length 1.
Merged in ses-1666 (pull request #23: reintegrating fixes to testsuite to master)
Merge branch 'master' of bitbucket.org:openrdf/sesame
SES-1682 Initial copy of Federation SAIL from AliBaba 2.0 Git commit aab17d4e9ee
SES-1682 Now compiles.

* Further copy from AliBaba 'model' hierarchy into Sesame 'model' hierarchy.
* Edited import statement in LinkedHashModel.java to new class location in Sesame.
* POM changes for successful compilation.
SES-1682 Tests compile, but 6 failures running them.
SES-1682 'mvn test' now passes

* Added code that allows QueryRoot.setParent(QueryRoot)
SES-1682 Fixed most serious PMD warnings in sail/federation

* Avoided fixing 'volatile' and 'Throwable' warnings, which could have impacted functionality.
* Added .settings to global .gitignore file
SES-1682 Renamed EchoWriteConnection -> AbstractEchoWriteConnection

* Fixed deprecated setAutoCommit calls.
SES-1682 Limited PMD warning fixes FederationConnection.
SES-1682 More PMD warning fixes in FederationConnection.java
Some more PMD warning fixes in FederationConnection
SES-1682 Fixed many PMD Warning, and renamed a few classes

* Renamed FederationConnection -> AbstractFederationConnection
* Renamed NaryOperator -> AbstractNaryOperator.
* Renamed NaryTupleOperator -> AbstractNaryTupleOperator
* SPARQLBuilderTest and FederationQueryTest now used ParameterizedRunner
SES-1682 Moved Federation SAIL Integration tests and modified LinkedHashModel

* There were inappropriate testsuite/* dependencies in core/sail/federation
* Internal classes to LinkedHashModel made private.
* Fixed 'raw types' issues of generics usage in LinkedHashModel and internal
  classes