OTHER: Make xmmsv_coll_t a part of xmmsv_t like list and dict.
OTHER: Add collection dag integrity tests.
OTHER: Add xmmsv_coll_is_type.
OTHER: Use xmmsv_(de)serialize to save/load collections.
OTHER: Change collection format in sqlite conversion tool.
OTHER: Add a coll migration tool for 0.8+ to 0.8++.

This tool should only be needed for people who have been
running a snapshot of XMMS2 after 0.8 before 0.9, packagers should
never install this tool.
FEATURE(2524): Bump src/lib/s4

* src/lib/s4 a9aff53...48487d9 (3):
  > OTHER: Add an order-builder to the s4_resultset_sort API.
  > OTHER: Remove unused _oplist_is_empty function.
  > OTHER: Add void arg to param-less funcs.
FEATURE(2524): Add field coalescing to Order collection.
FEATURE(2524): Accept list of strings for field attr of Order coll.
FEATURE(2524): Use coalescing sort in cli search.
OTHER: Fix broken medialib test.

Ordering the union by id breaks the component ordering
which is the ordering the test tries to exercise.
OTHER: Use objects generators instead of cstlib

Symbol from staticlibs are not included if not used in the target.
This is not a problem when linked against from an application (xmms2d),
but it is on shared libraries (libxmmsclient) that are expected to
expose thoses symbols anyway.

waf provides a way to transparently replace thoses staticlibs by
groups of 'objects' which do not suffer from the lazy imports.
OTHER: Apply shell wildcard matching to config keys

This makes it easy to query multiple related config options
while in shell mode, using for instance `server config effect*`
OTHER: Fix crash with malformed APIC frames
OTHER: Expanded AIFF support of sndfile plugin
OTHER: Avoid use after free on error path
OTHER: Create xmmscpriv and move some stuff there

This also removes inclusion of stdlib.h and stdio.h in our public headers.

Notice that the MPG123-documentation incorrectly says that SEEK_SET is in
stdlib.h. It is in stdio.h instead.
OTHER: typo in wscript
OTHER: Add default metadata mapper for producer
OTHER: Fix Opus header magic spec