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!
Merge pull request #120 from eodus/marginalL

Marginal window lengths for 1D SSA and Toeplitz SSA
Add type length check warning
Add circular 2d SSA
Merge pull request #119 from eodus/circular2dSSA

Add circular 2d SSA