update externals
add: dependencies for redhat 5 and centos 6, and cleaned redhat 6 dependencies
edit: update local packages path in dependency files
add round time by default for aggregation in line/bar graphs. And improve slink for better pyperfstore link processing.
change: Always show date instead of showing it only when it's not today
add: Option 'category' in diagram widget to display a categorized bar graph
add: Put uncategorized nodes in category 'unaffected'
fix: Metric meta-model with values supplied in widget's wizards (see #167)
Merge branch 'develop' into cat-bar-graph
fix: cfilter.cleanValues() check if the string is not a number before parsing it (see #168)
Merge branch 'develop' into cat-bar-graph
Merge branch 'cat-bar-graph' into develop
fix: item data check in form field cmetric (see #169)
fix: Check in Schedule controller when openning wizard
fix: Show legend and handle properly labels in cat bar graph
fix: Live reporting for widget Line Graph
fix: Add max value to serie configuration in widget diagram, to re-use it after
fix: Remove unused code and avoid nested if
fix: Improve cwidget initComponent()
change interval display for aggregation in aggregating a set of points with the minimal time value instead of the maximum like in previous version. Line graph widget display specific aggregation interval date. Clean code in removing comments.