Enable ensight reader
This commit enables VTKExtesions::IOEnsight
and adds an example reader an ensight file.
The python wrapping of PipelineBuilder
excepts all the readers to have "*Reader" in their name and use "Filename" property for specifying the file to read. Of course this check is very simplistic and actually failes for the ensight reader. The C++ class has better logic so we delegate to that one for now .
record underlying issue in #194
Edited by Christos Tsolakis