Initial write of adaptive linear bias class
The adaptive linear bias now compiles correctly
Updated parser to read in adaptive linear biases using ALB keyword
Added traj labels for colvarbias_alb
Variance estimate now seems correct for harmonic oscillator
Testing different implementations of algortihm. Currently does not converge
tried a few changes, still doesn\'t converge
Adaptive converges to a seemingly correct value, although the trajectory seems to show very high fluctuations