Add bugfixes to the release notes.

inst/NEWS

@@ -5,20 +5,28 @@ Preparations for Bioconductor release 3.5.
 
 Interface changes:
 * 'read_vcfs_as_granges':  The 'genome' parameter
-  must now be the name of a BSgenome library, to ensure that
-  the VCFs will be loaded in a compatible way with the
-  reference data.
+  must now be the name of a BSgenome library, to prevent
+  problems with seqlevels style.
+
   The function now accepts an optional 'group' parameter to
-  use a subset of chromosomes.  It also accepts  the new
-  optional 'check_alleles' parameter to significantly
-  speed up the reading of VCF files.
+  use a subset of chromosomes.
+
+  It also accepts  the new optional 'check_alleles'
+  parameter to significantly speed up the reading of VCF files.
+
 * 'plot_contribution': This function now accepts an
   optional parameter 'palette' to specify custom colors.
 
 Performance updates:
 * Implement parallel execution in 'read_vcfs_as_granges',
   'mut_matrix' and 'mut_matrix_stranded'.
 
+Bugfixes:
+* Fix 'mut_type_occurences' to handle missing types.
+* Fix 'mut_matrix' and 'mut_matrix_stranded' to emit warnings
+  when processing empty GRanges.
+* Fix inconsistencies in the README and the vignette.
+
 Other changes:
 * Various vignette updates.
 * Added unit tests for 'read_vcfs_as_granges', 'mut_matrix',