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 feature added.
 * Exclude raised areas feature added; forum discussion, pull request #2367.
 * Added `Face Region` option to boundary options. This allows the cutter to access areas smaller than cutter diameter, but physically accessible within the part geometry. forum mention, pull request #3534.
 * Adaptive Clearing improvements.
 * 3D Pocket: Reduction of air-milling above inclined pockets; forum discussion, pull request #2366.
 * 3D Surface
 * Improvements to general surfacing algorithm.
 * Initial 4th-axis support; forum discussion, pull request #2114.
 * Selection of individual faces; forum discussion, pull request #2849.
 * Fixes to and addition of various cut patterns: Line, Circular, CircularZigZag, Offset, Spiral, ZigZag. pull request #3327 and other pull requests.
 * New operation: Waterline.
 * The independent operation was split from 3D Surface; forum discussion, pull request #3268.
 * Experimental algorithm added using a combination of Path.Area offsets of model cross-sections.
 * Post Processing
 * Update of some Post Processors (Mainly GRBL and LinuxCNC).
 * Mach3/Mach4 Post Processor; pull request #3195.
 * Support tool height offset in the LinuxCNC Post Processor; pull request #2479.