Fixed border-top glitch on main element.
Added up button and variable button count styles discussed in #13
removed secondary-navbar styles
Fixed padding on sidebar buttons
added css error for changing sidebar button id to class.
Removed padding from navbar buttons so more text shows when width is cramped.
fixed box-sizing problem on firefox.
Fixed problem with bottom border of navbar in firefox.
Removed unnecessary inline-block call
Adjusted icon sizing to fix blurry icons.
Styled sagecell evaluate buttons, styles may need to move to content module though.
Merge branch 'feature/up-button' into develop