Translations:Release notes 0.19/18/en

Undoubtedly there are unforeseen bugs; these will be addressed as they are reported. Any existing dependence on Python 2 or Qt4 will not be supported beyond 1st January 2020 when Python 2 officially became unsupported by the Python Foundation. Please note that certain addons have not been ported yet to Python3/Qt5. This may be due to several reasons including lack of time by their developers, or broken dependencies that may not be easily fixed, or simply because the addon is considered obsolete. Individuals interested in the migration of a particular workbench or tool are encouraged to participate in the FreeCAD forum; see also, Python3 and Qt5 Compatible Addon Workbenches (in preparation for 0.18).