Make anchor point IDs human-readable

[GPHemsley]

The fix for #7 used existing IDs that are just a long string of alphanumeric characters that seem to be some sort of hash. These IDs are by no means human-readable, nor are they related to the sections they identify in any transparent way.

Eventually, sections should have IDs that are similar to the forms that are used by citations, so as to keep things obviously uniform and uniformly obvious.