lecture → lecturenotes (and CTAN)

NB Minor breaking change.

In preparation for CTAN this package is now called lecturenotes instead of lecture (I was informed by CTAN maintainers that the latter could cause confusion with existing lectures and lecturer classes and I am inclined to agree). The only change you will need to make in existing documents is to invoke the lecturenotes class instead of lecture as follows:

\documentclass[options]{lecturenotes}

No other changes are needed.

If all goes well, this package should be on CTAN soon!