Khaled Mammou authored Mar 25, 2018 and David Flynn committed May 17, 2018

When coding attribute prediction deltas, this commit implements a scheme
to code the first and subsequent attribute components using each:

 - one 65-ary contexts to code a delta prefix
 - one binary context to code remainder values

This replaces the previous scheme using:

 - one n-ary (max 2048) context to code a delta prefix (first comp.)
 - one binary context to code remainder values         (first comp.)
 - 512 n-ary (max 2048) contexts to code a delta prefix (subsequent comp.)
 - 512 binary contexts to code remainder values         (subsequent comp.)

Extracted-from: http://wg11.sc29.org/svn/repos/MPEG-I/Part5-PointCloudCompression/CE/CE0/CE0.1/trunk@1357


Reintegrated-by:  <dflynn@blackberry.com>