Add a supplemental fact
I don't really like this fix, but hey...
Merge pull request #552 from githart/master

trigger build at https://index.docker.io, tested
Basic updates to Link-Grammar and RelEx

I have updated the most obvious aspects that have changed. The OpenCog output format stayed the same, as far as I can see. Please specify which parts should be amended, described more in-depth, etc.
Merge pull request #554 from remu5/patch-1

Basic updates to Link-Grammar and RelEx
Update documentation
Update documentation
Merge pull request #555 from cosmoharrigan/documentation

Update documentation
Remove mention of framenet from tutorial.
Merge pull request #557 from linas/learn

Fix rare crash during atom deletion.
Merge pull request #558 from linas/einstein

Add a supplemental fact for Einstein puzzle
Some thoughts, changes, nothing too substantial
Merge pull request #559 from remu5/patch-1

Some thoughts, changes