Merge pull request #159 from rbpark/master

Minor fixes to styling
Issue #160 - Remove hadoop-core from dependencies.
Issue #162 - Trim username when changing permission or adding proxy user. Correct selections so that error messages are displayed correctly in project permission modals.
Merge pull request #161 from davidzchen/remove-hadoop-core

Remove hadoop-core from dependencies.
Merge pull request #163 from davidzchen/trim-usernames

Trim username when changing permission or adding proxy user
Issue #164 - Use callouts instead of alerts for placeholder boxes.
Merge pull request #166 from davidzchen/ui-polishing

Use callouts instead of alerts for placeholder boxes.
Issue #167 - Allow viewer plugins to specify more than one jobtype.
Issue #167 - Remove Job Summary tab. Remove log parsing code from job log view.
Issue #169 - Make graph CSS styles more reusable and accommodate both floating and non-floating sidebars.
Issue #164 - Fix remaining placeholders to use callouts. Remove 20px top margin from callout.
Merge pull request #171 from davidzchen/callouts

Fix remaining placeholders to use callouts
Merge pull request #168 from davidzchen/job-summary-plugin

Move Job Summary to plugin
Merge pull request #170 from davidzchen/graph-css

Make graph CSS styles more reusable
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.