Fine-tuned the inputs for sweepInitU and sweepR.
Increased the functionality of sweeping plotting tools. Added new, high-level plotting tool for plotting sweeps.
Merge pull request #2 from UCBerkeleyCivilSystems/dhdxexp

Dhdxexp
updated sweep stuff
Merge branch 'josh' of github.com:jstoermer/AdjointRamp into josh
Added the ability to return the cost when using strictlyPositiveLBLFGS.
Fine-tuned changes in previous commit.
revert back to old R at end