(De)Allocate dataCollector only on mod (un)load
Enable restart from parallel hdf5 files
Require parallel libSplash in cmake
Change index table for only include part. counts

 - index table only including counts (no offsets) prevents MPI_Allreduce
 - particle offsets are computed when reading the index table
Improve writeField in HDF5Writer
Fix globalSize/Offset in writeField
Remove local domain info for parallel write
Add prefix to write and add log message for load
Fix offsets and particle info table for parallelIO

 - improve description of domain offsets/sizes
 - add scalar position for GPUs
 - rename mpi size and rank in CommunicatorMPI
 - add 5D particles_info table to HDF5 to allow particle restarts
 - fix offsets for writing/reading fields
 - allow virtual slides at restart (re-create last GPU/position configuration)
 - change std::cout to pic log messages
Fix collective read and log message

 - all processes must participate in collective read (even without data)
 - fix log message (wrong param number)
Start enabling parallel libSplash support

 - use ParallelDomainCollector
 - add outgoing param in WriteSpecies
Add doc images for domain sizes/offsets
Improved domains image and added png
Integrate review requests

 - remove domains.pdf (in favor of png)
 - remove unnecessary mpi include
 - fix include pathes for splash (splash/splash.h)
 - fix comments
Fix domains image (no borders)
Beautified HDF5 log messages
Update splash2txt and remove compression

 - update splash2txt to use Parallel*Collector
 - make splash2txt more modular (enable more formats data later)
 - remove hdf5 compression since it is not supported by parallel hdf5
Fix rebase errors