Started 'develop' branch with new version number
Add Links section to main project readme
Node method aliases 'attrib', 'attrs' now refer to 'attributes' not 'set_attributes'

This arrangement is more intuitive, sorry if this is a breaking change.
Fix XPath underscore default-namespace prefix alias to work on Document node

- Calling xpath() on a Document node now causes any namespace prefixes
  defined by the document's root element to be checked, and the prefix
  '_' made available if there is a default namespace.
- Added test for failing case to prove the fix works.
- Added document section about using namespaces in XPath, since this is
  such a confusing cluster...
Magical lookup of lowercase elements no long needs trailing underscore

- Trailing underscore no longer required for "magical" traversal of
  all-lowercase child elements. The trailing underscore continues to
  work as before, but now is intended only to avoid name clashes when
  really necessary.
- Updated and improved documentation about magical traversal
Tentative start of ElementTree implementation, tests run but fail
Fix precedence bug in lookup of xmlns element attributes for lxml imll.

Use the namespace mapping prefix closest to the current node, not
closest to the root, when inspecting 'xmlns' attributes to determine the
preferred prefix name for a defined namespace.
Progress in ElementTree adapter implementation, some tests now pass
Merge branch 'develop' into feature/ElementTreeAdapter
Avoid ASCII encoding errors, inelegantly, by replacing problematic chars
Merge branch 'develop' into feature/ElementTreeAdapter
All node tests except xpath queries now pass for ElementTree
Parser tests now passing for (c)ElementTree adapter
Tests in test_writer now passing for (c)ElementTree
Raise more specific exceptions for error conditions recognised by xml4h
Builder tests now pass for (c)ElementTree adapter
XPath (and all) tests now pass for (c)ElementTree adapter.

This is more of a capitulation than an accomplishment. I gave up trying
to make ElementTree XPath queries perform any better than the underlying
library supports, and rewrote the tests to avoid asking anything
difficult of this implementation.

Remember to note "limited" xpath support in documentation for users of
(c)ElementTree adapter, per http://effbot.org/zone/element-xpath.htm
Only ElementTree versions 1.3+ and 1.0.6+ (cElementTree) are supported
Fix transplant of ElementTree nodes to delete original nodes.

This required broad changes to make the transplanted node's original
parent available to the ElementTreeAdapter, since it's not always
possible to lookup the parent of a given node in ElementTree.
Use python 2.6-compatible ascii encoding params