Merge branch 'develop' into issue-783

build.xml

pom.xml

src/design/field.puml

...rg/orekit/attitudes/AggregateBoundedAttitudeProvider.java

src/main/java/org/orekit/attitudes/AttitudeBuilder.java

src/main/java/org/orekit/attitudes/AttitudeProvider.java

src/main/java/org/orekit/attitudes/AttitudesSequence.java

src/main/java/org/orekit/attitudes/BodyCenterPointing.java

src/main/java/org/orekit/attitudes/CelestialBodyPointed.java

src/main/java/org/orekit/attitudes/FieldAttitude.java

src/main/java/org/orekit/attitudes/FixedFrameBuilder.java

src/main/java/org/orekit/attitudes/FixedRate.java

src/main/java/org/orekit/attitudes/GroundPointing.java

src/main/java/org/orekit/attitudes/InertialProvider.java

src/main/java/org/orekit/attitudes/LofOffset.java

src/main/java/org/orekit/attitudes/LofOffsetPointing.java

src/main/java/org/orekit/attitudes/NadirPointing.java

src/main/java/org/orekit/attitudes/SpinStabilized.java

src/main/java/org/orekit/attitudes/TabulatedLofOffset.java

src/main/java/org/orekit/attitudes/TabulatedProvider.java