[LV2] LV2 1.4.0

[David Robillard]

Good day, pluggers and plugees,

LV2 1.4.0 is out.  This minor release mainly fixes a few bugs in the
data and utility headers, and improves documentation.

More about LV2: http://lv2plug.in/
Download:       http://lv2plug.in/spec/lv2-1.4.0.tar.bz2

Changes of note:
 * A new feature, state:loadDefaultState
 * One change that affects (run-time, dynamic) compatibility,
   the format of patch:Set has changed.
 * The new log/logger.h makes the logger extension pleasant to use,
   or transparently falls back to stderr if unsupported. 
 * A new well-documented metronome example/test case for tempo sync.

There are no new APIs or changes to existing APIs that affect plugin
binary compatibility.

Complete list of changes:
 * Generate book-style HTML documentation from example plugins.
 * Add metronome example plugin to demonstrate sample accurate
   tempo sync.
 * lv2core: Set range of lv2:designation to lv2:Designation.
 * lv2core: Make lv2:Parameter rdfs:subClassOf rdf:Property.
 * lv2core: Add lv2:control for designating primary event-based
   control ports.
 * lv2core: Reserve minor version 0 for unstable development plugins.
 * lv2core: Add lv2:EnvelopePlugin class.
 * atom: Fix lv2_atom_sequence_end().
 * atom: Remove atom:stringType in favour of owl:onDatatype so generic
   tools can understand and validate atom literals.
 * atom: Improve atom documentation.
 * buf-size: Fix typo in bufsz:sequenceSize label.
 * event: Fix incorrect return type in lv2_event_get().
 * log: Add logger convenience API.
 * options: Set the range of opts:requiredOption and
   opts:supportedOption to opts:Option.
 * patch: Make patch:Set a compact message for setting one property.
 * patch: Add patch:readable and patch:writable for describing available
   properties.
 * state: Add state:loadDefaultState feature so plugins can have their
   default state loaded without hard-coding default state as a special
   case.

All hosts that support state are encouraged to support
state:loadDefaultState which should be straightforward.  Otherwise,
there are no new implementation requirements, but upgrading is
recommended.

Enjoy,

-dr
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