Introcude multiple reportType (timeline, counters)
New javascript/css:
- Fix issue with beeing able to display only 2 charts
- Add support for layers, pie and histogram
- Fix issue with legend not being aligned by insetring it directly into the html5 graph itself

(Disabled CSV data, and might have broken support for multiple graphs on one chart. TBD)
Reformatting of analytics.html
Add {x,y} value for mouse over dot
Fix legend alignement
Add rounder corner for legend rect
Add option to have pie label inseide or outside pie
pom.xml: update to killbill-oss-parent 0.5.9

Signed-off-by: Pierre-Alexandre Meyer <pierre@mouraf.org>
Merge remote-tracking branch 'origin/charts' into api-changes-pre-1.0