Globe v0.4.8

• fixed #trac-11505 Two issues with Globe's results table
• fixed #trac-11411 Inconsistent uptime/downtime in search results and on details page
• fixed bug where the graph tries to render when there's no data
• fixed bug where the page threw an error because of emberjs/ember.js#1580
• fixed bug where period computation threw an error because it tried to compute 3_days from 1_week without 1_week existing