0.5.3

• Spec: when a should or should_not fail, the filename and line number, including the source's line, is included in the error message.
• Spec: added -l switch to be able to run a spec defined in a line.
• Added crystal spec file:line
• Properties (property, setter, getter) can now be restricted to a type with the syntax property name :: Type.
• Enums can be used outside lib. They inherit Enum, can have methods and can be marked with @[Flags].
• Removed the distinction between lib enums and regular enums.
• Fixed: it was incorrectly possible to define class, def, etc. inside a call block.
• The syntax for specifying the base type of an enum, enum Name < BaseType has been deprecated. Use enum Name : BaseType.
• Added Array#<=> and make it comparable to other arrays.