Move compress_amount into utils, as it alone is not deserving of a module namespace.
Allow direct specification of file object for ScriptPickler load/dump methods.
Add serialize_leint and deserialize_leint based on the hash serialization routines.
Add testing of unspecified-length integer serialization.
Test that the correct symbols are found by a wildcard import statement.
Ordering fix.
Restructure integer/hash serialization to make the _leint/_beint functions basic. Hash serialization is now little-endian serialization by another name, and only included for compatibility purposes (serialize_hash is used everywhere).