a few changes 8
a few changes 9
newly rendered pdfs: pdfs/main_2013-06-27_04-21.pdf pdfs/diff_2013-06-27_04-21.pdf
removed draft formating
newly rendered pdfs: pdfs/main_2013-06-27_04-25.pdf pdfs/diff_2013-06-27_04-25.pdf
fixed mistakes in the abstract
newly rendered pdfs: pdfs/main_2013-06-27_04-29.pdf pdfs/diff_2013-06-27_04-29.pdf