multiviewtest 2.0.0

1. Added helper functions which generate data from two multivariate views, a multivariate view and a network view, and two network views.
2. Added a function implementing a test for independence between the communities in two network views from Gao, L.L., Witten, D., Bien, J. Testing for Association in Multi-View Network Data, preprint.
3. Added a function implementing a test for independence between the communities in a network view and the lusters in a multivariate view from Gao, L.L., Witten, D., Bien, J. Testing for Association in Multi-View Network Data, preprint.