
version0.0.12

 - Added a tags attribute to the CSDmodel object.
 - Changed 'sampling_interval' key to 'count'.
 - Changed 'quantity' key to 'quantity_name'.
 - Changed 'index_zero_value' key to 'coordinates_offset'.
 - Changed 'fft_output_order' key to 'complex_fft'.


version0.0.11

- Renamed IndependentVariable class to Dimension.
- Renamed LinearlySpacedDimension class to LinearDimension.
- Renamed ArbitrarilySpacedDimension class to MonotonicDimension.

- Added a reciprocal attribute to LinearDimension and MonotonicDimension classes.
- Removed the reverse attribute from all Dimension classes.

- Changed 'sampling_interval' keyword to 'increment'.
- Changed 'reference_offset' keyword to 'index_zero_value'.
- Changed 'linear_spacing' literal to 'linear'.
- Changed 'arbitrarily_sampled' literal to 'monotonic'.
- Changed the defining of the coordinates from LinearDimension to
        $X^(ref) = m_k J_k - c_k 1$
  to
        $X^(ref) = m_k J_k + c_k 1$,
  where $c_k$ is the reference offset, $m_k$ is the increment, and $J_k$ is the
  set of integer indices along the dimension.

- Added 'description' key to 'Dimension', 'DependentVariable' and 'CSDM' object.
- Changed 'CSDM' keyword to 'csdm'
- Changed 'FFT_output_order' keyword to 'fft_output_order'
- Changed 'components_URL' keyword to 'components_url'

New methods

- sum(index=0) Sum of data values from the dependent variable along the
        independent variable at indices given by `index`.
- prop(index=0) Product of data values from the dependent variable along the
        independent variable at indices given by `index`.
