Pull a few straglers into the docs

Author: mikeboers

av/logging.pyx

@@ -34,14 +34,19 @@ level_map = {
 
 
 def get_level():
+    """Return current logging threshold."""
     return lib.av_log_get_level()
 
 def set_level(int level):
+    """set_level(level)
+
+    Set logging threshold."""
     lib.av_log_set_level(level)
 
 cdef bint log_after_shutdown = False
 
 def set_log_after_shutdown(v):
+    """Set if logging should continue after Python shutdown."""
     global log_after_shutdown
     log_after_shutdown = v
 

av/utils.pyx

@@ -14,6 +14,7 @@ cdef int AV_ERROR_MAX_STRING_SIZE = 64
 
 
 class AVError(EnvironmentError):
+    """Exception class for errors from within the underlying FFmpeg/Libav."""
     pass
 AVError.__module__ = 'av'
 

docs/api.rst

@@ -189,3 +189,22 @@ Subtitles
     .. autoclass:: AssSubtitle
         :members:
 
+
+Utilities
+=========
+
+Logging
+-------
+
+.. automodule:: av.logging
+    :members:
+
+Other
+-----
+
+.. automodule:: av.utils
+    :members:
+
+    .. autoclass:: AVError
+
+