Translations:Release notes 0.16/10/it

Ambiente FEM

 * Ora i comandi GUI di FEM hanno le scorciatoie da tastiera. È stato introdotto un dialogo delle preferenza per FEA. Il percorso per il binario di calculix è una delle impostazioni delle preferenze.
 * Nel contenitore GUI delle analisi i componenti dell'analisi usano drag & drop. Essi possono essere spostati dentro e fuori da un contenitore dell'analisi. Poiché ora non vi è il supporto per analisi multiple, un membro può essere spostato anche in un'altra analisi. In un'analisi si possono creare dei vincoli multipli.
 * GUI analisi rapida Alla GUI è stato aggiunto un pulsante per l'analisi rapida. Esso purga i risultati, scrive il file Calculix di input e esegue l'analisi per il risolutore selezionato. Viene rilevato se per Calculix è disponibile il multithreading e usa il massimo possibile di thread.
 * Input file L'editor interno a FreeCAD supporta la modifica dei file di input calculix (*.inp). È anche stata implementata l'evidenziazione della sintassi.
 * Netgen mesh object The GUI and property editor of the Netgen mesh object has been reworked. Tetraeder meshing off one order and second order elements is supported as well as adjusting meshing parameter.
 * Constraint force and constraint fix objects It is now possible to add Forces and Fixes on edges and Vertexes.
 * Constraint pressure object A new object for pressure load on faces has been added. The pressure (load per area) is passed directly to CalculiX which means the node loads are not calculated by FreeCAD but CalculiX instead.
 * Constraint prescribed displacement object A new object for prescribed displacements has been added. The prescribed displacement can be added to vertexes, edges and faces. For shell and beam analysis’s it is possible to fix the rotational degrees of freedom.
 * Beam section object The new beam section object allows to define rectangle cross section for beam FEM. There is support for different beam sections in one analysis by defining reference shapes for each cross section
 * Shell thickness object The new shell thickness object allows to define thicknesses of shell plates. Like in beam section there is support for multiple shell thicknesses in one analysis by defining reference shapes.
 * Material object Multiple materials are supported for edge, shell and solid meshes. Like for the beam section and shell thickness objects a appropriate FEM Mesh is needed to use the multiple material.
 * Solver object As a base for multiple solver a solver object has been implemented. All analysis properties moved from analysis to solver.
 * Frequency analysis A frequency analysis can be made. The number of eigenvalue or eigenshape to calculate can be adjusted in preference GUI.
 *  View provider Shell and beam FEM-Meshes can be viewed in FreeCAD and thus the results of such analysis too.
 * Python API Methods for working with FEM-Meshes and making an Analysis from python have been added.
 * GMSH Macro An interesting external developing is the Macro_GMSH which makes it possible to use GMSH for meshing. Very useful for all not able to compile FreeCAD with Netgen or for meshing shell- or edge meshes.
 * General Improvements Due to the heavy development taking place, there have been tons of improvements on the code base of FEM module.