Merge branch 'release/0.1.12' into develop
Update to 0.2.0-SNAPSHOT
add QTree
update QTree docs
fix the QTree tests to use the size hints
FAQ Style minor change
Merge pull request #160 from david206/patch-1

FAQ Style minor change on README.md
add a comment to QTree.commonAncestor, make some methods private
use pattern matching to make @johnynek happy
Merge pull request #159 from avibryant/qtree

QTree
Bumping version numbers
Merge branch 'release/0.1.13'