Started ParallelDomainCollector

 - added new domain collector interfaces
 - started ParallelDomainCollector
 - fixed some names in SDC
Fixed domains handling and added test

 - disabled compression in PDC (not supported)
 - fixed domains handling in PDomainCollector
 - fixed some named in DomainsTest
 - added Parallel_DomainsTest
Fixed/check some conditions for domains
Fixed PDC and domain collectors for grid/poly data

 - added handling of poly data
 - fixed global size/offset detection for non-3D data
 - added test for poly domain data