• Fixed handling of space(s) in between operator 05a8d87.
• Fixed double dot range for invalid input (#164).
• Added nil safe operator (#173).
• Fixed acceptWord checks the rune after word (#184).
• Added ability to return errors from custom functions. (#159).
• Added codegen for expr envs (#193).
• Fixed io/fs.FileName replace to os.FileName (#194).
• Fixed exprgen shouldn't generate methods for aliases (#196).
• Added support for ConstantNode in checker (#197).
• Many documentation improvements.