Translations:Release notes 0.19/71/en


 * Fixed issue #3993, Python 3 memory leak; forum discussion, commit 3c205946e.
 * Ability to use an arbitrary number of an object as the base model for a Path.Job, each one being positionable individually; pull request #2056.
 * PathDeburr: Added direction selection. Fixed DressupLeadInOut problem.
 * MillFace: Clear edges.
 * MillFace: Exclude raised areas; forum discussion, pull request #2367.
 * Update of some Post Processors (Mainly GRBL and LinuxCNC).
 * Adaptive Clearing improvements.
 * 3D Pocket: Reduction of air-milling above inclined pockets; forum discussion, pull request #2366.
 * 3D Surface: Improvements to both the OCL DropCutter and the Waterline algorithms
 * 3D Surface: Initial 4th-axis support; forum discussion, pull request #2114.
 * 3D Surface: Selection of individual faces; pull request #2849.
 * Post: Mach3/Mach4 Post Processor; pull request #3195.
 * Post: Support tool height offset in the LinuxCNC Post Processor; pull request #2479.