Merge branch 'master' into three-eight (lost 'joinInFacts')
-rw-r--r-- 197 .gitignore
-rw-r--r-- 2043 PROBLEMS
-rw-r--r-- 782 README
drwxr-xr-x - paper
drwxr-xr-x - private
drwxr-xr-x - prototypes
drwxr-xr-x - src
drwxr-xr-x - testing