Added GMRES gist to "mathematics" page.
Added GMRES gist to "mathematics" page.

Also added a date to stencils bullet.

dhermes/bossylobster-blog,dhermes/bossylobster-blog,dhermes/bossylobster-blog,dhermes/bossylobster-blog,dhermes/bossylobster-blog,dhermes/bossylobster-blog,dhermes/bossylobster-blog