hdf5 explicit copy of particle floatX to float
fix value access while copy to tmp array
change writeField interface for hdf5

- copy data to tmp array befor dumping with splash
- change github annotation for ParticleAttribute
add gihub annotations

use correct splash writeDomain interface #
Merge pull request #297 from psychocoderHPC/topic-hdf5StrideHack

copy float3 to float array before splash write