To fix XML::Writer.set_quote_char UT, wrong expected string (#63)
Merge pull request #64 from julp/fix_writer_quote_char_ut

To fix XML::Writer.set_quote_char UT, wrong expected string (#63)
Fixing equality check of LibXML::XML::Error against other objects
Merge pull request #67 from szajbus/master

Equality check of LibXML::XML::Error
Change the writer code a bit.
Add #node_type method to dtd.
Fix segmentation fault for issue #62.  The deregisternode function was incorrectly NULLing out a node's mark and free functions for nodes removed from a document tree.
Merge branch 'master' of github.com:xml4r/libxml-ruby
fix tests for nil TypeErrors for ruby 2.0=<

The text for nil to string conversions has gone from:

$ ruby -e '"" + nil rescue puts $!'
can't convert nil into String

to:

$ ruby -e '"" + nil rescue puts $!'
no implicit conversion of nil into String
Merge pull request #69 from geoffwa/bugfix/nil_typeerror_2.0

fix tests for nil TypeErrors for ruby 2.0=<