Rename "morituri" module to "whipper".

Fixes https://github.com/JoeLametta/whipper/issues/100

whipper/program/sox.py

@@ -0,0 +1,26 @@
+import os
+from subprocess import Popen, PIPE
+
+import logging
+logger = logging.getLogger(__name__)
+
+SOX = 'sox'
+
+def peak_level(track_path):
+    """
+    Accepts a path to a sox-decodable audio file.
+
+    Returns track peak level from sox ('maximum amplitude') as a float.
+    Returns None on error.
+    """
+    if not os.path.exists(track_path):
+        logger.warning("SoX peak detection failed: file not found")
+        return None
+    sox = Popen([SOX, track_path, "-n", "stat"], stderr=PIPE)
+    out, err = sox.communicate()
+    if sox.returncode:
+        logger.warning("SoX peak detection failed: " + str(sox.returncode))
+        return None
+    # relevant captured line looks like:
+    # Maximum amplitude: 0.123456
+    return float(err.splitlines()[3].split()[2])