v0.6.0

SurfaceFluxes v0.6.0

Diff since v0.5.1

Closed issues:

• Non convergence (#35)
• Determine root-solver initial guess based on virtual dry static energy. (#89)

Merged pull requests:

• Update documentation (#81) (@akshaysridhar)
• RSL model documentation (#87) (@akshaysridhar)
• Make initial guess of l_mo dependent on stability regimes (#90) (@szy21)