change to pyproject.toml

also update versioneer to most recent version

bugfix pyproject.toml

wip versioneer

wip versioneer

add CacheMamimum to accumulators.py

style changes

fixed mistake in header

Added Accumulator called CacheMaximum as proposed in Issue #35(Add Heap Accumulator)

Added Accumulator as proposed in Issue #35(Add Heap Accumulator) with name CacheMaximum

add accumulator tutorial

BinSorter

Rewrote the CDF Estimator to accept multidimensional inputs using numpy arrays. This allows to process image and other multidimensional data.
The marker positons `self.m_pos` and marker heights `self.mm_height` are now stored in `np.ndarray`, if clauses in the code are replaced byb `np.where`, `self._adjust_heights` now calculates both the linear interpolation and the parabolic interpolation and checks then which values are needed. This more time consuming. Tests using `benchmark_acculumators.py` show that the new implementation is 3x slower than the previous Commit that still uses the implementation using lists (prev: 18.1+-5.7 us/observation, current: 65+-16 us/observation, tested on my MacBook Pro, 13 inch, M1, 2020 with numpy 1.23.5).

Change axis order in CDF Estimator to store data contiguously in memory and thus improve performance

Benchmarking CDFEstimator makes clear, that storing the data in the last axis (`a[..., i]`) is not the way  to go
with numpy. This is caused by the internal order of numpy arrays being 'C-order' or row-major. Storing the data in the
first axis (`a[i, ...]`) instead cuts the computation time roughly in half
(from ~ 1.2 s to ~ 614 ms on my Macbook Pro, 13-inch, M1, 2020 for 100 1000x1000 images) and greatly facilitates the
indexing and thus increases the readability of the code.

Change `None` to `np.nan`

 Conflicts:
	test/test_quantile.py

Minor Change in .gitignore.

make DynamicBinSorter inherit from BinSorter. This change also makes
nbins and bin_edges read only properties, which they should be anyways.

add CacheAccumulator

New tests for MedianEstimator

guess thats more user friendly