Added swapaxes function.
Small fixes in tests.
Added norm function.
Ajusted the code format and added an interface to swapaxes in the TensorVariable object.
Fixed norm function and added it to var.py.
Fixed small mistake in code.
Fixed swapaxes function in var, indentation error in test_basic and added lstsq function in ops with tests.
Fixed small mistake in norm and swapaxes function.
Fixed indentation mistake in test_basic.py.
Fixed indentation.
Fixed Norm test in test_linalg.
Added fill function in var.py.
Added test for fill function in var.
Fixed tests and added numpy compare test to norm function.
Fixed norm test to include outdated numpy version.
Removed unnecessary z variable in norm function.
Fixed norm tests.
Fixed indentation error.
Fixed norm test for outdated numpy.
Fixed test code for norm and swapaxes function.