Outline for the CudaMatrix class
EquelleRuntimeCUDA now creates/destroys cusparse handle in constructor/destructor
Added test for CudaMatrix class. Started implementing constructors.
Constructor/destructors for CudaMatrix, as well as toHost() and compare function in test.
Copy constructor and copy assignment constructor. Fixed matrix description.
Implemented + in cudaMatrix for sparse matrices
Implemented * in cudaMatrix for sparse matrices
Changed + operator to cudaMatrixSum function that takes a beta to find C = A + beta*B. Use this for + and -
Implemented CudaMatrix multiplication with Scalar.
namechange: {mult,div}ScalCollection_kernel -> scal{Mult,Div}Coll_kernel
Merge branch 'master' of https://github.com/sintefmath/equelle