task 16 : bpdn upon lasso

[LinaMiao]

-- reflect user defined optTol in Lasso
-- based on code from task 15
-- make sure each lasso problem being terminated correctly

[LinaMiao]

-- works fine for help_spgl1 example. which can be seen from the publish file in task 16(help_spgl1)

-- next try on simu shots and l1 migration problem.

[LinaMiao]

-- for convolution problem, generally decrease the residual faster.
Both of those two situations, either method can give right amplitudes

-- for PQN if given more iterations, updatetau every iteration, the result is not so bad, but this increase the function evaluation time significantly.
Needs to be fixed.
See script2.pdf

[LinaMiao]

-- modify output info, correct time and add a total projects in