Merge branch 'release/0.1.9'
Fix for serialization of <text>, <class>, and <id> elements
Version bump
Fix <text> element serialization
Bump version to 0.1.11
Serialize elements in declared order
Preserve prefix for elements in other namespaces
Update element order in fixtures
Preserve namespaces of children in element with custom namespace
Fix elements order in atom:feed
Bump version to 0.1.12
Fix false as elements/attributes default method
Update version to 0.1.13
Remove stupid version spec
Bump patch version, 0.1.14
Parsing attributes with names specifed by :as option
Bump patch version to 0.1.15
Run specs in random order
Improved text nodes support

Fix text deserialization.
Add special cases #to_s, #==, #<=>, #=~ for text nodes.
Inject common xml attributes (xml:lang, xml:base), fix deserialization