Blender Git Loki

Extract common modifier parameters into ModifierEvalContext struct

The contents of the ModifierEvalContext struct are constant while iterating
over the modifier stack. The struct thus should be only created once,
outside any loop over the modifiers.

Reintroduce edgehash2

Reverted some changes to MOD_build

Moved to other file, updated comment

Removing commented-out code

Formatting

Merge remote-tracking branch 'origin/blender2.8' into temp-modifier-rm-cddm

Removed TODO

Moved vertex merging to mesh_merge.c

Handled most of Cambpell's review comments

Merge remote-tracking branch 'origin/blender2.8' into temp-modifier-rm-cddm

Ported Array modifier

Introduced CDDM_from_mesh_ex() to create a non-referencing CDDM

This allows the mesh to be freed and the CDDM kept.

Vertex merging in mirror modifier is working

Also fixed some memory issues.

Almost finished mirror modifier (still needs vertex merging)

Merge remote-tracking branch 'origin/blender2.8' into temp-modifier-rm-cddm

Almost ported mirror modifier

Typo fix

Use 'struct' keyword

Without this, the forward declaration is useless as the real declaration
needs to be known by the compiler.

Removed commented-out code