Merge branch 't/fade_improvements'

Was cooking for almost a month, let's merge it.

	483d31 fade: Upgrade client command log message to loglevel NOTICE.
	49412f fade: Handle non-positive fade time gracefully.
	376456 fade: Add --loglevel option.
	dec704 fade: Generate fade.ggo from m4 template.
	0968b2 fade: Introduce --mixer-api to choose between ALSA and OSS.
	b4171b fade: Add the ALSA mixer implementation.
	46af7d fade: Switch to modular mixer API.
	702457 fade: Infrastructure for the modular mixer API.
	3a2580 fade: Abort on client command failures.
	b618da fade: Remove some unnecessary includes.
	f502e6 configure: Add fade.o to object list only if oss was detected.

diff --cc NEWS
index 6ee5086a41f3abd4b406448be51d459af9717cec,6ee5086a41f3abd4b406448be51d459af9717cec..2c05b8f90be044f7070ef5a2a08a589e4d46b58d
--- 1/NEWS
--- 2/NEWS
+++ b/NEWS
@@@ -7,6 -7,6 +7,7 @@@
          in the new "releases" branch.
        - Overhaul of the build system: All generated files are now
          written to the "build" directory.
++      - The modular mixer API and the alsa mixer.
  
  --------------------------------------
  0.4.11 (2012-07-20) "mutual diversity"

diff --cc configure.ac
Simple merge