v0.8.2

Enhancements:

• Support gauges based on String mbean attributes if they are parsable as numbers (#14)
• Add instrumentation support for Apache HttpClient 3.x (#16)

Bug fixes:

• Zoom on the trace chart is broken (#11)
• Trace profile is not displayed when there are no trace entries (#13)
• Fix calculation/display of ever-increasing gauges after a gap (#15)
• De-selecting all gauges leaves the last gauge data displayed (#17)
• Trace entry timing columns sometimes overlap (#18)