-fillgaps_depth and val_exceeds_thresh added to clean folder
-formatting changes for fillgaps_time for consistency
-remove numpy from nan_beyond_surface to fix error
-notice that fillgaps_time and fillgaps_depth do the same thing, need to change to interpolate over just time/depth respectively

-update these functions to interpolate over time and depth respectively
-using fillmissing function in matlab now to specify an interpolation dimension
-include maxgap option for both above functions
-update comments for above functions

New worksheet to demo val_exceeds_thresh and fill_gaps_time functions.
Calls the same functions/uses same file for testing as python tests for these functions.

-fillgaps_time now checks var's type a little, and also uses correct error syntax
-Note: MATLAB's fillmissing function does not have a default option for MaxGap, so if statement is still used for MaxGap argument

-update fillgaps_depth function to cover discussed changes. now checking if var is from dolfyn structure, using better syntax for throwing errors
-Note: fillmissing function doesn't offer default value for MaxGap in documentation, if statement needed to call correct function from fillgaps_depth

-val_exceeds_thresh now checks types and throws an error if structure passed to function is not from dolfyn

Add tests/Dolfyn_Test_Clean.m to mimic test_clean.py from python version of MHKiT. Currently compares cleaned data to itself in order to pass tests. Next step: Move cleaned data files into repo to compare with tests here.

Since actual test file added, test_clean_adcp_example.mlx not needed

Dolfyn_Test_Clean.m updated to have functions for future tests.
Dolfyn_Test_Clean.m now has all same tests as test_clean.py
Commented out sections for "TODO" component/future clean functions to be added

move required cleaned data from python version to test_data folder
start using cleaned data to compare in the tests (instead of comparing to self)

There was a bug in read_netcd.m where it wasn't reading from the fixed field x_star, and was trying to read the nonexistant x* field.

Add find_surface function, not quite finished still has a few errors from translating from python.

Cleaned up these files with additional comments and clarifications on items.