:bug: replace np.NaN by np.nan for compatibility with newer NumPy versions

explicitly close HEKA bundle after use

Refactoring of HekaReader.py to improve performance and memory usage. (#18)

:bug: fix load error for HEKA data with float32 or 64 dataformat

:books: small update to documentation

:books: update documentation

:bug: fix error with slope evaluation and add slope to summary in gui

further GUI development, refactorings, and bugfixes (#17)

Add event half-width calculation (#16)

rename serires parameter to load_series in from_heka_file method

:bug: fixed issue when loading series from HEKA files and add option to load specified series

:zap: improve peak finding for large window sizes

:bug: event positions are now removed from plot upon reloading of data

:bug: improve average event fit by removing incorrect bound of curve fit

:bug: fix median calculation with NaNs