added Dockerfile
experimenting with different learning algorithms from sklearn
see if presence of more zeros and ones causes overfit
passing the same relation instead of all 26 ones
to see if it fixes learning (it didn't)
trying interpolation instead of regression
found a nice way to handle composition
using a different plot setting
SUMO import
SUMO: nested expressions don't have TruthValues
better printing
SUMO: remove documentation
Put SUMO in its own directory
Remove documentary predicates from SUMO import
Merge pull request #453 from jadeoneill/master

Import SUMO ontology into OpenCog
Fix rules
Add script to remove timestamps from log file
Improve robustness by better matching timestamps by using rm_timestamps.sh
Added optimal code to the 3DPathfinder, enabling it looking for a better path by inverse the start and end point.
Made the navigation plan to use optimal pathfinder.
Make test_atomspace.py compatible with changes made to atom printing format in #450 to address CythonAtomSpace unit test failure in #452