Add default stats dir.
Merge branch 'master' into stats-dir
WebServer and ExecServer creates statsdir on start-up if it doesn't exist.
Merge branch 'master' into stats-dir
Update unit build.xml to build all test projects.
Remove unused azkaban-svg.less and move azkaban-graph.css to less.
Clean up CSS styles for flow job list tree view.
Change auto pan zoom checkbox into toggle button.
Print cause of InvocationTargetException when trying to load plugin.
Save absolute path of stats dir.
Improve appearance of main page flows list for projects.
Merge pull request #106 from davidzchen/stats-dir

Default stats dir and some UI improvements
Formatting javascript code.
Restore requirement button click to fetch last run stats for flow summary, which was broken in merge. Make job logs the default tab on job details page.
Do not display time graph if there are no data points for job history and executions pages.
Using javascript references rather than jquery selectors to select items. It's more generic to peg a
javascript obj to the row rather than reconstructing dom id.
Add 40px bottom margin to project list.
Fixing selections on the jobs list.
Merge pull request #107 from davidzchen/stats-dir

Minor UI fixes