increase patch level
update NEWS file
Update README.md
Update README.md
Update README.md
use a set instead of a vector for contemporaries
fix detection of contemporaries in debug mode
fix wrong return type
update travis config
add infrastructure for tracing secondary roots
add checks for root registration
implement tracking of roots
started implementing top-down contemporaries alg.
implement TopDown search for contemporaries
fix and update unit tests
optimize parameters
reduce pruning; now we prune only every second rec
add various minor tweaks
update unit tests
update tools