Fixed small bugs
Tensor class is modified to incorporate the discussions on Nov. 11
Incorporated basic Tensor concepts discussed on Nov. 18 to Tensor class
Implemented AXPY in a generic way as an example
Fixed bug on axpy_impl, now it works (see test/test.C for usage)
Added gemm, dense tensor works, but tensor of tensor doesn't work due to some issues
Implemented tensor_traits to test whether tensor has standard concepts
axpy and gemm are now working with tensor of tensor
Moved static_assert into template parameters with enable_if
Implemented TArray class which has fixed-size rank as template parameter
Fixed small bugs in TArray, move generic blas impl. to generic dir.
Deleted scratch directory work from repo.
Merge pull request #4 from naokin/master

Implemented public dense tensor interfaces and some test cases