Modified alloc expression

Added a condition to differentiate between long double 'ones' call
Modified getMatStr

The function is used to generate string of the blas classes. The default class for INT64 was double. Changed that to long.
Modified blas libraries constructors for VrArrayI64

Since the intOk analysis is converting everything to integers need to start supporting VrArrayI64 better
MOdified array Slicing

Was not dereferencing pointer before calling array slice template. That was causing it to create a new array instead of reusing the old one.