Changelog

0.1.4
    changes:
        - Wavelet class can be subclassed
        - requires NumPy, edit numerix.py to use with other numeric modules,
          array.array is no more directly supported
        - code cleanup & comments
        - wavedec and waverec Pyrex code moved to pure Python multilevel.py
          module
        - doctesting doc examples

    fixes:
        - fixed swt for too high level value
        - fixed bug in upcoef wrapper code for some take values

0.1.2
    changes:
        - support for custom filter banks
        - now compiles without numpy installed

    fixes:
        - fixed handling of non-contiguous arrays 

0.1.0 
    initial release
