ixa-v0.2.1

Added

• Added execution_stats.rs that implements collecting profiling data. (#427)

Fixed

• define_multi_property_index should not references private module (#450)

Other

• release-pr should run every 2 weeks (#446)
• Added a command line flag for a timeline progress bar. (#426)
• Unorphands numeric.rs, which was accidentally orphaned in #333. (#443)
• fix define_report macro ( renamed from create_report_trait) (#447)
• fix performance md (#445)