Add test datafiles for distribution
Add test datafiles for distribution

* test/Makefile.am: Set TEST_DATAFILES to the files in the datasets
      folder and add TEST_DATAFILES to EXTRA_DIST

martinichka/matio-coder,tbeu/matio,telehan/libmatio,telehan/libmatio,NJannasch/matio,tbeu/matio,martinichka/matio-coder,CBL-ORION/matio-sf-mirror,NJannasch/matio,MaartenBent/matio,CBL-ORION/matio-sf-mirror,MaartenBent/matio,CBL-ORION/matio,tbeu/matio,martinichka/matio-coder,CBL-ORION/matio,MaartenBent/matio,tbeu/matio,MaartenBent/matio