Steepest descent with line search
Squashed commit of the following:

commit cd96ae91ecb0ad012a8a8e548d1e20dc5c884b62
Author: sagar <sagar.writeme@gmail.com>
Date:   Sun Mar 31 00:21:12 2013 +0530

    Steepest Descent with line search working

commit 5c779cfb1ad74bd6ea744a5e1dfb3a6c2f548295
Author: sagar <sagar.writeme@gmail.com>
Date:   Sat Mar 30 21:07:34 2013 +0530

    Stubs for SDBLS and test script

    Stubs for SDBLS and test script

    Fixed description of the test script

commit 2c8c39bb769eeefe6d90edb7faae78a73bda0453
Author: sagar <sagar.writeme@gmail.com>
Date:   Sat Mar 30 21:01:47 2013 +0530

    Notes on backtracking line search

    Added notes on backtracking for step size selection

    Fixed corrupt PDF