v0.2.2

Fixes

• Add YAML loading and refactor into separate file (#135)
• Add command line flag to eval, print, and exit (#152)
• Add compiler check for consistent rule types (#147)
• Add set_diff built-in (#133)
• Add simple 'show' command to print current module (#108)
• Added examples to 'help' output in REPL (#151)
• Check package declarations for conflicts (#137)
• Deep copy modules in compiler (#158)
• Fix evaluation of refs to set literals (#149)
• Fix indexing usage for refs with intersecting vars (#153)
• Fix output for references iterating sets (#148)
• Fix parser handling of keywords in variable names (#178)
• Improve file loading support (#163)
• Remove conflict error for same key/value pairs (#165)
• Support "data" query in REPL (#150)

Miscellaneous

• Add new compiler harness for ad-hoc queries
• Add tab completion of imports