add compression codec trait and snappy compression
fix dependencies
Shows totals for shuffle data and CPU time in Stage, homepage overviews including active time
Split Shuffle Activity overview column for read/write
Displys shuffle read/write only if exists, wraps if statements, trims old vals, grabs current time once
Made metrics Option instead of Some, fixed NullPointerException
Maximum task failures configurable
style
Current time called once with value now
Moved val now to render
Cleaned up code based on pwendell's suggestions
Fixed outdated bugs
changes per comments.
typo
Use Bootstrap progress bars in web UI
Merge branch 'master' of https://github.com/mesos/spark into bootstrap-update

cially if it merges an updated upstream into a topic branch.
Added started tasks to progress bar
Alphabetized imports
Remove duplicate loss history and clarify why.
Also some minor style fixes.
Merge pull request #735 from karenfeng/ui-807

Totals for shuffle data and CPU time