- `use standard;` (bring in a set of standard and external dependencies)
- `use common;` (bring in a low-level subset of this crate; basically anything that itself requires only `use standard;`)

And, from an external create:
- `use ethcore_util::*;` (bring in the entirety of this module and the standard dependencies)

Additional work & convenience functions on crypto, bytes & hash.

Renaming mut_bytes() to as_slice_mut().

Secure trie functions & structs.

address to and from h256

convenient creation of uint

SemanticVersion struct.

Additional documentation.

Repot Trie and split into mutable and immutable variants.

Repotted Trie module.

heapsize && squeeze