[report] clarify outline of report.
Add Jason's SGD pseudo-code.
Add draft of intro.
Add logistic regression equations.
Complete draft of design of algorithms.
Add hyperparameters discussion.
Finish draft of pre-processing section.
Add sources for data sets.
Switch to more general Latex style.

Use article documentclass with slight tweaks.
Add basic abstract.
Gets L-BFGS working (thanks to Adrian).
Add test error plots.