Issue #174 - Style PREPARING status label.
Issue #174 - Use variables for status colors.
Issue #176 - Make leftover Job Summary CSS reusable.
Issue #178 - Add histogram of job durations to flow stats.
Issue #178 - Only display histogram on flow page summary.
Issue #178 - Fix issue where whether SLA is set is always false.
Issue #178 - Display message if no job provides any job stats.
Issue #178 - Display warnings found during flow stats analysis.
Issue #180 - Time Graph gracefully handles invalid data points.
Issue #180 - Use current time if endTime is -1
Merge pull request #181 from davidzchen/time-graph-invalid-points

Time Graph gracefully handles invalid data points.
Merge pull request #177 from davidzchen/cleanup-jobsummary-css

Make leftover Job Summary CSS reusable.
Merge pull request #175 from davidzchen/status-labels

Add style for PREPARING status and use variables for color values
Merge pull request #179 from davidzchen/robust-flow-summary

Flow Summary improvements
Modified clone constructor to work with private variables
Merge pull request #182 from bhsaurabh/master

Modified clone constructor to work with private variables