Change name plugin field in order to be able to manage the plugin from geo file

See merge request !172

PostSICN is defined twice. Second one should be "PostSIGE".

See merge request !171

Performance improvements on many_holes

See merge request !168

Add ENABLE_PROFILE build option for profiling with perf

Closes #416

See merge request !169

better fix (I think) for MSH2 and MSH3 : when -part_no_physicals is given, just copy the parent physicals in the partitioned entities

make MSH3 behave as before with partitioned meshes if no physicals are created for partitioned entities

PS: MSH3 is undocumented and will never be. MSH4 is the future :-)

put origin world coordinate at center viewport + make sure model does not move when changing rotation center

See merge request !165

Partitioning fix

See merge request !166

make sure screen stay unchanged after any rotation center modification + origin of world coordinate at center of screen

Performance increase for many_holes benchmark

See merge request !164

backward compatibility of new partitioned meshes with old MSH2 format, when -part_no_physicals is set