V0.2.7

What's Changed

• use multiprocessing for strain.py by @carnisj in #253
• implement preprocessing.process_scan by @carnisj in #254
• Implement multiprocessing for the preprocessing by @carnisj in #255
• Use isort to check the format of imports by @carnisj in #256
• prepare for release v0.2.7 by @carnisj in #257

Full Changelog: v0.2.6...v0.2.7