libopusenc version 0.2

This is a minor bugfix release including:
* Fixing a gapless bug in the LPC filtering
* Fixing a crash on destroy when using the pull API

libopusenc version 0.2

This release adds support for Ambisonics mapping families 2 and 3. It also
fixes a few bugs in libopusenc 0.1.1, including an occasional failure in
ope_encoder_drain().

libopusenc version 0.1.1

This release fixes a few bugs in libopusenc 0.1, including the sample-accurate
handling at the end of files. It also fixes crashes in a few use cases.

libopusenc version 0.1 (initial release)