some refactoring
Merge branch 'master' of github.com:opencog/opencog
Add some debug timing printing
Implement alterenate pair counter.

Maybe this one will be faster.
Bug fix: use equal? not eq?
Another bugfix for the new code
Misc status updates
Create a new, non-pattern-match version
Reorder common code so that it can be shared.
Status update
Remove wrong pointer to ref operator
Suppress compile warning (order of member assignment)
Turtle down constness
Final few notes, for this project.
Merge pull request #594 from linas/mi

Tweak scripts for computing mutual information
composition cases progressing
Merge pull request #595 from keyvan-m-sadeghi/master

Interval Algebra - Composition
Merge fix for #596
Merge pull request #597 from cosmoharrigan/pln

PLN - fix for #596 and update log output option
Temporary change for #598 - make confidence of NotAB 1.0 instead of 0.001 in modusPonensFormula