DATAJPA-531 - Added reference to SD JPA with REST guide.

Add link to accessing JPA Data With REST from readme.md.

Original pull request: #90.
DATAJPA-510 - Fix regression when sorting by property of associated object.

The main problem was a bug in querydsl 3.3.2 that has been resolved resolved in querydsl 3.3.3 to which we just updated in in spring-data-build/#70.

Cleaner usage of querydsl API and less brittle casting. Added test case for sorting by nested association property that is wrapped in a function, e.g. lower(…).

Original pull request: #87.
DATAJPA-525 - Guard against null types returned from JPA meta-model.

Some JpaProviders (read: Hibernate in combination with Hibernate Envers) sometimes return null values from ManagedType.getJavaType() for embedded types values.

We now explicitly check for null values before adding the type to the initial entity set processed by the mapping context.

Related pull request: #89.
DATAJPA-543 - Update reference documentation for JPA 2.1 features.

Added descriptions for EntityGraph configuration and stored procedure support.

Original pull request: #91.
DATAJPA-456 - Add support for specifying only the projection part of a custom count query.

We now support to specify just the projection part for the count query generation via the "countProjection" property of the @Query annotation.
This avoids having to repetitively specify parts of the original query.

Original pull request: #84.
DATAJPA-544 - Added Travis config file to run matrix builds.
DATACMNS-494 - Fix test setup in JpaRepositoriesRegistrarUnitTests.

We now explicitly set an Environment in JpaRepositoriesRegistrarUnitTests to make sure the registrar can work correctly.
DATAJPA-542 - Updated changelog.
DATAJPA-542 - Prepare 1.6 GA.
DATAJPA-542 - Release version 1.6.0.RELEASE.
DATAJPA-542 - Prepare next development iteration.
DATAJPA-542 - After release cleanups.
DATAJPA-545 - Fixed regression in discovery of StringQuery parameters.

Special characters like french accents (e.g., abonnés) were not allowed anymore (was in SD JPA 1.2) in named parameter bindings. Adjusted regex in StringQuery to cover a broader list of characters.

Original pull request: #93.
DATAJPA-548 - Improved documentation for jpa:repositories xml configuration.

Stated more explicitly that we perform a lookup for an EntityManagerFactory bean with the name "entityManagerFactory" by default for the entity-manager-factory-ref attribute.

Original pull request: #94.