Version 0.10.0

• Fix parsing kind parameters like a_1 on literals. Previously, that would
  be parsed as a kind parameter on a kind parameter. Now we don't do that,
  following gfortran's behaviour.
  • Kind parameter representation is changed to explicitly say if it's an
    integer kind or named constant kind, rather than reusing Expression.
• BOZ literals
  • add some syntactic info (to enable checking standards conformance)
  • export bozAsTwosComp function for reading as two's complement integer
• allow named constants in complex literals
• document FirstParameter, SecondParameter behaviour/safety, fix erroneous
  instances
• fiddle with record selectors for some AST nodes (for better Aeson instances)
• pair IF/CASE conditions with their blocks, rather than splitting between two
  lists
• ExpFunctionCall and StCall store procedure arguments in AList ([a])
  instead of Maybe AList (Maybe [a])
  • Matching is safer because empty lists are always [] instead of Nothing
    or Just []. Construction for empty lists is more awkward.
  • A better solution would be to use an AList-like that also stores extra
    syntactic information.
• refactored a number of small AST nodes
  • ImpElement
  • ForallHeader
• add Hackage documentation to many individual AST constructors and fields
• improve include parser interface #227
• improve newline handling for block parsers #228
• fix some source span misses #225