update copyright date
update tested-with field
add hyperlinks annotation
from DTree now handles Node (RAnnot ...
remove debug trace
travis: require ghc-7.8.1 , try ghc HEAD
Merge pull request #57 from tdox/hyperlinks

Hyperlinks
add hyperlinks to CHANGES
travis: fix capitalization of GHC head

[ci skip]
add Tad to contributors list
move Annotation type to D.C.Types and add new href function
re-export href from D.Core