mjucker/aostools: aostools v2.5

This is a major update with several new functions and bugfixes.

• DetectEvents(): Threshold-based event detection from time-dependent data (c0a62720b7578abb99d7c5b3f5dd1b217a123c42)
• Vorticity(), PotentialVorticity(), PotentialTemperature() (d35de9d42a87120a101a6b4f0338ed198e825c00)
• IPV(): Potential vorticity on isentropic (potential temperature) levels. Requires wrf-python. (d35de9d42a87120a101a6b4f0338ed198e825c00)
• ComputeOzoneHoleArea(), TotalColumnOzone(), GlobalMass(), ComputeSurface() (47591ada1e2420848f89b13237ba2bab65009984)
• Regress() (cce1e68633262fe5ded7eb423bf76fa55081e7a0)

• universal gas constant R, Avogadro's number Na (47591ada1e2420848f89b13237ba2bab65009984)
• pre-defined color maps cmaps{} (b30b6aeb0ebe55d49da10dd23727e58609edfb5b)
• beta(): computes total meridional vorticity gradient, including u_yy, if u is provided (8ca6bf65c760c4415bc78490f2d8fc82373be877)
• sinlat(): computes sinus of latitude, similar to coslat() (8ca6bf65c760c4415bc78490f2d8fc82373be877)

• eof() now takes xr.DataArray() as input. In this case, it also outputs xr.DataArrays. (ccd72d0ad7a240602a9b19df1ff9c132002a1d69)
• StandardGrid() adds possibility to sort pressure top-down or bottom-up (40db2ac7f35deb0a3e573b5c2038578addec2b68)
• Anomaly() and Standardize() now allow to define a specific time period to compute the climatology from (d98374258a0c61ecb2264d1491569ab2a66f4b0a)