new color scheme

created a formal color scheme instead of almost random colors.
add space in code boxes.
modify colors again.
Merge branch 'develop' into colors
Merge pull request #566 from ayr0/colors

new color scheme
Removed dependancy on otf fonts(to remove compile error)
Merge pull request #577 from aamcbee/compile_fix

Removed dependency on otf fonts(to remove compile error)
Merge branch 'develop' of https://github.com/byuimpact/numerical_computing into develop