refactor(analyzer): rename analyzer files

analyzer/libretime_analyzer/steps/step.py

@@ -0,0 +1,9 @@
+# TODO: use an abstract base class (ie. import from abc ...) once we have python >=3.3 that supports @staticmethod with @abstractmethod
+
+
+class Analyzer:
+    """Abstract base class for all "analyzers"."""
+
+    @staticmethod
+    def analyze(filename, metadata):
+        raise NotImplementedError