Remove margin and border radius from #wrapper on smaller screens
Increase base font size to 18px
Use font-size-base variable
Add post excerpt and title heading to blog index
Override blog index styles
Add excerpt field to 2014-10-19 post

Otherwise, jekyll inserts image in auto-generated excerpt.
Merge pull request #44 from agarzola/master

Remove margins & border radius on smaller screens; increase base font-size