In addition to pack of conflicts listed below, also had to comment out particle part of new Alembic code... :/
Conflicts:
intern/ghost/intern/GHOST_WindowWin32.cpp
source/blender/blenkernel/BKE_effect.h
source/blender/blenkernel/BKE_pointcache.h
source/blender/blenkernel/intern/cloth.c
source/blender/blenkernel/intern/depsgraph.c
source/blender/blenkernel/intern/dynamicpaint.c
source/blender/blenkernel/intern/effect.c
source/blender/blenkernel/intern/particle_system.c
source/blender/blenkernel/intern/pointcache.c
source/blender/blenkernel/intern/rigidbody.c
source/blender/blenkernel/intern/smoke.c
source/blender/blenkernel/intern/softbody.c
source/blender/depsgraph/intern/builder/deg_builder_relations.cc
source/blender/gpu/intern/gpu_debug.c
source/blender/makesdna/DNA_object_types.h
source/blender/makesrna/intern/rna_particle.c
All in all, this patch adds an Alembic importer, an Alembic exporter,
and a new CacheFile data block which, for now, wraps around an Alembic
archive. This data block is made available through a new modifier ("Mesh
Sequence Cache") as well as a new constraint ("Transform Cache") to
somewhat properly support respectively geometric and transformation data
streaming from alembic caches.
A more in-depth documentation is to be found on the wiki, as well as a
guide to compile alembic: https://wiki.blender.org/index.php/
User:Kevindietrich/AlembicBasicIo.
Many thanks to everyone involved in this little project, and huge shout
out to "cgstrive" for the thorough testings with Maya, 3ds Max, Houdini
and Realflow as well as @fjuhec, @jensverwiebe and @jasperge for the
custom builds and compile fixes.
Reviewers: sergey, campbellbarton, mont29
Reviewed By: sergey, campbellbarton, mont29
Differential Revision: https://developer.blender.org/D2060