Initial MSSA Cadzow without tests
Initial Cadzow tests
Add some hweights and wnorm tests
Sasha's matmul for 1dssa
Get rid of temporary `convolve` method

So beautiful name and so local functionality... RIP.
Move division by Nx*Ny into convolution method
Implement `Sashas's hbhmatmul`
Add and use convolve2d method

C-code only, without R caller wrap
General convolve2 functon
Eluminate convolve2.open/.filter
Fix Lcov.matrix for marginal L values
Add test with marginal L for 1dSSA
Fix ToeplitzSSA for L = 1

drop = TRUE by default is my favourite feature in R!
Add type length check warning
Add circular 2d SSA
Bump
Fix fancy cloning
Reworked mcadzow and 1d cadzow with .hweights