adjusted pipe() graphPipeline() inputsList() to match latest pipeline spec
modded pipelineToXML(..., export=T) for new pipeline
altered pipelineToXML() handling of components when export=FALSE
modded pipelineToXML() pipes to new pipeline schema
tweaking namespace definitions in pipelineToXML - only use when writing component as full XML
removed name attr from moduleToXML; removed name/ref case from moduleToXML - now handled when saving pipeline components
loadPipeline() now looking for component nodes with name, ref, path, type
fixed broken inputsList() when type == "external"