src/algebra/distro.spad: Typo in documentation
Remove unwanted documentation, add two new convolutions in DISTRO
Misc cleanup in MRING
Optimize '*' in MRING
Misc cleanup
Make PI has OrderedMonoid
Fix 'concat! : List % -> %' in URAGG
Fixup previous commit
Fix 'construct' in MRING
Optimize '+' in MRING