replaced tet-volume calculation with function calls to basic implementation
test code for calling new functionality
added basic bounding sphere calculation
working algorithm using c-arrays
renamed vis method
added handling of degenerate cases
changed array to vector and handled re-ordering more elegantly
fixed index error and added documentation
added tests for BoundingSphere class
removed test-only functionality and fixed indentation
adjusted indentation and comments for tests
renamed distance method, changed initialisation list, fixed issue with volume calculation
renamed class, adjusted dates, shortened det calculation
added a test that calculates that bounding sphere or points on a bounding sphere
Merge pull request #447 from rinkk/RadiusEdgeRatio

Minimal bounding spheres for points
initial implementation of radius-edge-metric
removed lots and lots of pointers
added new metric to gui
adjusted author
Enabled PETSc 3.5