Merge branch 'features/JAL-2446NCList' into spikes/mungo

Merge branch 'features/JAL-2446NCList' into spikes/mungo

Conflicts:
	help/html/releases.html
	src/jalview/datamodel/BinarySequence.java
	src/jalview/datamodel/Sequence.java
	src/jalview/datamodel/SequenceI.java
	src/jalview/datamodel/features/FeatureStore.java
	src/jalview/datamodel/features/NCList.java
	src/jalview/datamodel/features/NCNode.java
	src/jalview/datamodel/features/SequenceFeatures.java
	src/jalview/gui/SeqCanvas.java
	src/jalview/renderer/seqfeatures/FeatureRenderer.java
	src/jalview/schemes/ClustalxColourScheme.java
	src/jalview/urls/UrlLinkDisplay.java
	test/jalview/datamodel/AlignmentTest.java
	test/jalview/datamodel/SequenceTest.java
	test/jalview/datamodel/features/FeatureStoreTest.java
	test/jalview/datamodel/features/SequenceFeaturesTest.java
	test/jalview/urls/UrlLinkDisplayTest.java