Added some information about ACF and PACF
Add LMA-based implementation
Minor fixes
Added LM algorithm
Minor fixes
Some typo corrections
Minor fixes
Tiny fix
Minor fixes
Changes to the partials
More fixes
Update partial derivatives
Refine the formulation
Minor changes
Added the partials for the exact likelihood
Minor change
Some corrections
Minor corrections
Added the tricky initial conditions

Made syntax more consistent
Minor fixes