adding quality, filtersFailed, and filtersPassed to Variant, fixes #219

src/main/resources/avro/variants.avdl

@@ -191,6 +191,23 @@ record Call {
   */
   array<double> genotypeLikelihood = [];
 
+  /**
+  Phred-scaled quality score for the assertion made in ALT.
+  If ALT is ‘.’ (no variant) then this is −10log10 prob(variant), and if ALT is
+  not ‘.’ this is −10log10 prob(no variant).
+  */
+  union { null, double } quality = null;
+
+  /**
+  A list of filters (normally quality filters) this variant has failed.
+  */
+  array<string> filtersFailed = [];
+
+  /**
+  A list of filters (normally quality filters) this variant has passed.
+  */
+  array<string> filtersPassed = [];
+
   /**
   A map of additional variant call information.
   */