Changelog for hashable-1.0.1.1

Version 1.0.1.1 * Fixed bug in Hashable instance for lazy ByteStrings where differences in the internal structure of the ByteString could cause different hash values for ByteStrings that are equal according to ==. Version 1.0.1.0 * Added two helpers for creating Hashable instances: hashPtr and hashByteArray. Version 1.0.0 * Separated Hashable class to its own package from hashmap 1.0.0.3.