c0345f8b8f Use relative import paths rather than absolute (Martin Habovstiak)
Pull request description:
When doing large refactorings such as moving entire modules around referring to items defined in a parent module by mentioning `crate` is umbersome since the paths change and make the move confusing. It also obscures the fact that some concepts are related.
This changes a few paths to relative so that the refactoring in the future will be easier.
ACKs for top commit:
apoelstra:
ACK c0345f8b8f617e5cf98bccb7500f2389511b1865; successfully ran local tests; lgtm
tcharding:
ACK c0345f8b8f
Tree-SHA512: 3c6e774c81ccdaa5b27b06f25e80385dd0972232a3267cdabb671c86ba86feaa2672185815430ad8efa1cf3888e05c897f5c43d8750d6a071bd970570d4574cb