Nef-pipelines

correct error in mars export fragments (mars connected pseudo residue file)

added an about command for information about the project

added support for export xcamshift chemical shift restraint files

added export of mars connected pseudo residue file

added support for reading MARS shift files

corrected an error in how test files are searched for

added missing test files

added support for import of RDCs from a csv file

added support for segment codes to pales / dc when exporting rdcs

added support for exporting neff rdc restraints to xplor legacy format