Add skipped parameter to steps

- the skipped parameter can be used to track which steps have been skipped and
adjust the behaviour appropriatelly (ex. change the output colour to yellow)

Author: dsax7

pytest_bdd/feature.py

@@ -453,6 +453,7 @@ def __init__(self, feature, name, line_number, example_converters=None, tags=Non
         self.line_number = line_number
         self.example_converters = example_converters
         self.tags = tags or set()
+        self.skipped = False
         self.failed = False
         self.test_function = None
 
@@ -530,6 +531,7 @@ def __init__(self, name, type, indent, line_number, keyword):
         self.indent = indent
         self.type = type
         self.line_number = line_number
+        self.skipped = False
         self.failed = False
         self.start = 0
         self.stop = 0

pytest_bdd/reporting.py

@@ -13,6 +13,7 @@
 class StepReport(object):
     """Step excecution report."""
 
+    skipped = False
     failed = False
     stopped = None
 
@@ -35,16 +36,19 @@ def serialize(self):
             "type": self.step.type,
             "keyword": self.step.keyword,
             "line_number": self.step.line_number,
+            "skipped": self.skipped,
             "failed": self.failed,
             "duration": self.duration,
         }
 
-    def finalize(self, failed):
+    def finalize(self, failed, skipped=False):
         """Stop collecting information and finalize the report.
 
         :param bool failed: Wheither the step excecution is failed.
+        :param bool skipped: Indicates if the step execution is skipped.
         """
         self.stopped = time.time()
+        self.skipped = skipped
         self.failed = failed
 
     @property