start of wavelet module (#240)

* start of wavelet module

* lint fix

* blank tests

* morseafun

* no list input

* tes t +continue morseave

* wavelet done. more tests needed.

* typo fix

* output order change and init wavetrans

* working wavetrans

* wavetrans tests added

* morsespace

* more explicit variable names

* f_axis -> freq_axis

* lint fixes

* fs -> rad_freq, wt -> wtx

* om -> norm_rad_freq, fm

* Use SciPy for gamma and gammaln

* Update clouddrift/wavelet.py

Co-authored-by: Milan Curcic <caomaco@gmail.com>

* Update clouddrift/wavelet.py

leaving the 0 was for my own sake of tracking indices properly

Co-authored-by: Milan Curcic <caomaco@gmail.com>

* Update clouddrift/wavelet.py

Co-authored-by: Milan Curcic <caomaco@gmail.com>

* Update clouddrift/wavelet.py

Co-authored-by: Milan Curcic <caomaco@gmail.com>

* clean-up

* lint

* remove test file

* error fix, name change, more tests, some docstring

* docstrings update

* lint

* code fixes

* morse_space fixed

* docstring fix

* more fixes

* normalization change

* tests

* delete functions

* cleanup

* more tests

* cleanup

* morse_wavelet_transform

* name change and docstrings

* lint fix

* module headline

* more tests

* citation fixes

* Add the license statement

* license typo

* post review changes

* Clean up

* Remove unused imports

* remove warnings

* lint

---------

Co-authored-by: milancurcic <caomaco@gmail.com>
Co-authored-by: Philippe Miron <philippe.miron@dtn.com>

clouddrift/__init__.py

@@ -8,3 +8,4 @@
 import clouddrift.datasets
 import clouddrift.sphere
 import clouddrift.signal
+import clouddrift.wavelet