Xtrack version 0.29.0

Changes:

• Introduce Exciter element.
• Introduce TwissTable.get_R_matrix method.
• Add consistency check in LimitRacetrack initialisation.
• Introduce Line.remove_redundant_apertures method.
• Introduce Multiline.from_dict and Multiline.to_dict methods.
• Line simplification methods now support inplace=False and keep=['ELE1', 'ELE2', ... ]
• Survey.__getitem__ supports tuple ['name', 'column']
• Updated all test_data json files following the introduction of Marker elements