Merge pull request #11 from mdoube/testing

Testing
RoiMan: stop using deprecated RoiManager.getList() method

ROIs now now which slice they are on so there's no need for the ugly get
label hack used previously.

Return null if there are no point ROIs in the ROI manager
SphereFitter: show a message and return if there are no points defined

Closes bug reported by Pete Watson (University of Hull)
Isosurface: be a bit more verbose when generating meshes
UsageReporter: keep trying to detect Mac on Intel
UsageReporter: remove offending ';'
UsageReporter: convert "ppc" to "PPC" for user agent string

Thanks to Lily Wilson for testing on PPC and Intel Mac laptops
Usage Reporter: drop the U security designation from Macs' user agent
BoneJ version 1.3.11
Help: restore -testing branch tag
Anisotropy: give user the option to record eigen vectors and values
AnalyseSkeleton: update with changes in Ignacio's FIJI version

Will be nice one day to be able to use a proper dependency
management system and stop bundling code like this...
ImageCheck: add ImageJ version blacklisting

Refuse to run if a known broken version of ImageJ is being used.
RoiInterpolator: check environment and return if something is missing
usageReporter: add space between os.version and os.arch
HU calibrate calibration curve
Slice Geometry: fix bug in HU->density calibration

Reported by Catherine Ambrose of U. Texas at Houston.
Moments: fix HU -> density calibration
BoneJ version 1.3.12
Help: reinstate -testing branch designation