0.3.1

• Add support for multiple source files/directories (#62)
• Default null value causes NumberFormatException (#61)
• Compile error when schema contains list with empty default value (#59)
• Exception thrown for empty string enum value. (#58)
• Add flag not to generate hashCode() and equals() to Maven plugin (#53)
• Add flag to Maven plugin that allows Jackson annotations to be omitted (#52)
• No source file in exception from parse error (#50)