update news

Author: grlloyd

NEWS

@@ -1,8 +1,17 @@
+Changes 1.5.5
++ change t-test outputs to data.frame
++ fix NA bug in feature_boxplot chart
++ use new ontology system in place of stato
+
+Changes 1.4.2
++ fix fold change threshold using median (#56)
++ HSD param "unbalanced" is no longer ignored
+
 Changes 1.5.2
-- add outputs to auto-generated documentation
-- fix fold change threshold using median (#56)
-- add fold change using means (#57)
-- HSD param "unbalanced" is no longer ignored
++ add outputs to auto-generated documentation
++ fix fold change threshold using median (#56)
++ add fold change using means (#57)
++ HSD param "unbalanced" is no longer ignored
 
 Changes 1.5.1
 + fixed broken paired tests