Add argument in "generate.linear.R"

Add "timefirst" in argument "output" to enable choice of
output order(row-major or column-major) in data matrix.

Modify "generate.linear.test.R".
Add output in "generate.linear.R"

Add output of eigenvalues.

Modify "generate.linear.test.R".
Add argument in "generate.linear.R"

Add "noiselevel" in argument "output",
to allow noise added to "data".

Modify "generate.linear.test.R".