Umka 0.10

• Uninitialized dynamic arrays and maps are treated as valid
• Optimized append(), insert(), delete()
• cap() for dynamic arrays, copy() for maps
• Covariant dynamic arrays
• Map key types must be comparable
• any as an alias for interface{}
• Optimized += for strings
• OS-specific suffixes (_windows or _linux) are allowed in UMI file names
• Better error messages
• Bug fixes