This is an alternative to Prelude that is not meant to depart drastically
from the standard. The principles of Hydrogen are:
1. Be total, not partial.
2. Use Data.Text.Text, not Data.String.String.
3. Use generic functions, not Data.List functions.
4. Whatever is omitted should be replaced.
To use this package, use the NoImplicitPrelude language option, and import
H.Prelude.