Version change log.

=0.17=
Added helper functions for code generation (see Language.ECMAScript3.Syntax.CodeGen). Bug fixes to the Arbitrary instances.

=0.16.2=
Build fixes for GHC 7.4.2 and 7.8.2.

=0.16.1=
Removed unicode-escaping of illegal identifier characters in the
pretty-printer. Adjusted the isValid predicate to check for illegal
characters identifiers. Adjusted the Arbitrary instance to only produce
valid identifier names.

=0.16=
Rewritten the Arbitrary instances using 'testing-feat'. Adjusted the
pretty-printer to escape invalid characters in identifier names
automatically, which gives better usability in code generation use-cases.
Added an 'isValid' predicate to check the validity of the AST. Note that the
pretty-printer is guaranteed to produce syntactically correct code only
for valid ASTs.

=0.15.4=
Fixed haddock build failure.

=0.15.3=
Ported the pretty printer to use 'wl-pprint' instead of
'pretty'. Pretty-printed code is now more compact and resembles common
formatting conventions. Fixed bugs where the pretty-printer produced
unparseable source representations for expression statements starting with
'{' or "function". Disabled the QuickCheck pretty-printer test.

=0.15.2=
Fixed an error in the .cabal file that prevented some of the test modules
to be packaged.

=0.15.1=
Added semicolons after the "return" statement in the pretty printer to
avoid certain class of syntax error when printed code is parsed
again. Changed the pretty-printer to put the IntLit in parenthesis if it's
found on the left-side of the '.' (field access) operator.

=0.15=
Bug fixes in the pretty-printer, the parser and the QuickCheck arbitrary
instance for the AST. Refactored tests to use test-framework. Reorganized
the interface for the parser to make it consistent; see deprecation
warnings for details. Added Language.ECMAScript3.SourceDiff -- a simple
source-based differ for ECMAScript programs, which is now used for
visualizing test failures. Revised package dependencies. Factored the
analyses out in a separate package: language-ecmascript-analysis;
Language.ECMAScript3.Analysis.* are now deprecated.

=0.14=
Refactoring of the pretty-printing module: added class Pretty with a more
comprehensive coverage of AST datatypes and better documentation. Removed
duplicate code and deprecated all old interfaces (everything except class
Pretty). Old interfaces would be removed in 1.0 (still a long way out).

=0.13=
Added class PP for pretty-printing

=0.12=
Added a 'setAnnotation' function to the 'HasAnnotation' class. Added
a 'withAnnotation' helper function to modify the top level annotation.

=0.11.1=
Fixed binary operator precedence in the parser.

=0.11=
Added a simple quasi-quoter for ECMAScript (see
Language.ECMAScript3.Syntax.QuasiQuote)

=0.10=
The ParenExpr constructor was removed from the Expression AST
(WARNING: might break some builds). The pretty printer was rewritten
to automatically parenthesize sub-expressions based on operator
precedence. Added a (beta quality) arbitrary instance for all the
AST's to generate random JavaScript programs (useful for testing).


=0.9.1=
Increased the upper bound on data-default in dependencies. See
https://github.com/jswebtools/language-ecmascript/pull/5