Resubmission #2

Changes made  as part of resubmitted the manuscript in response to the
second round of reviewer comments in Dec 2014. Major changes include:
1) Coding MGA-HSJ, Serial, and Simultaneous methods in Matlab used in
comparisons in Figs 1, 3-6. and allow user to specify which methods are
used
2) Updating generate alternatives to
- allow specifying the solver used for optimizations
- number of gibbs draws per stratified sample
3) Printing out runtime performance on stratify sample and MGA methods
4) Fix column widths printing in action table in parallel coordinate
plot tool