adding tests for fixed eigenvalues, adding 3-dimensional data tests
changing computation time format
drawing model ellipses by default
some changes in print.cec
changing email address
using model covariances by default in plot function
changing energy to cost.function, updating tests
merging

Merge branch 'master' of github.com:azureblue/cec

Conflicts:
	R/tests.R
	inst/cec_tests/clustering.test.R
	inst/cec_tests/energy.calculation.test.ball1.R
	inst/cec_tests/energy.calculation.test.mouseset3d.R