v0.5.0

Changes

• better resource handling for compression
• add nullSafe from() constructor
• rename toObjectArray() to toBoxedArray() (will be removed in 1.0)
• add appendNullSafe and append string with encoding
• add experimental ProGuard optimized version (can be used with classifier 'optimized') #19
• add constant time equals()
• fix or() operator using and() internally #2 (thx @jbaiter and @ioreskovic)
• remove debugging println in Bytes.encode()