== 1.5.6 / unreleased
* Features
* Improved performance of XML::Document#collect_namespaces. #761 (Thanks, Juergen Mangler!)
* New callback SAX::Document#processing_instruction (Thanks, Kitaiti Makoto!)
* Node#native_content= allows setting unescaped node contant. #768
* XPath lookup with namespaces supports symbol keys. #729 (Thanks, Ben Langfeld.)
* XML::Node#[]= stringifies values. #729 (Thanks, Ben Langfeld.)
* bin/nokogiri will process a document from $stdin
* bin/nokogiri -e will execute a program from the command line
* bin/nokogiri --version will print the Xerces and NekoHTML versions when ran with JRuby.
* Bugfixes
* Nokogiri now detects XSLT transform errors. #731 (Thanks, Justin Fitzsimmons!)
* Don't throw an Error when trying to replace top-level text node in DocumentFragment. #775
* Raise an ArgumentError if an invalid encoding is passed to the SAX parser. #756 (Thanks, Bradley Schaefer!)
* [JRuby] space prior to xml preamble causes nokogiri to fail parsing. (fixed along with #748) #790
* [JRuby] Fixed the bug Nokogiri::XML::Node#content inconsistency between Java and C. #794, #797
* [JRuby] raises INVALID_CHARACTER_ERR exception when EntityReference name starts with '#'. #719
* [JRuby] doesn't coerce namespaces out of strings on a direct subclass of Node. #715
* [JRuby] Node#content now renders newlines properly. #737 (Thanks, Piotr Szmielew!)
* [JRuby] Unknown namespace are ignore when the recover option is used. #748
* [JRuby] XPath queries for namespaces should not throw exceptions when called twice in a row. #764
* [JRuby] More consistent (with libxml2) whitespace formatting when emitting XML. #771
* [JRuby] namespaced attributes broken when appending raw xml to builder. #770
* [JRuby] Nokogiri::XML::Document#wrap raises undefined method `length' for nil:NilClass when trying to << to a node. #781
* [JRuby] Fixed "bad file descriptor" bug when closing open file descriptors. #495
* [JRuby] JRuby/CRuby incompatibility for attribute decorators. #785
* [JRuby] Issues parsing valid XML with no internal subset in the DTD. #547, #811
* [JRuby] Issues parsing valid node content when it contains colons. #728
* [JRuby] Correctly parse the doc type of html documents. #733
* [JRuby] Include dtd in the xml output when a builder is used with create_internal_subset. #751
* [JRuby] builder requires textwrappers for valid utf8 in jruby, not in mri. #784
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