(fix) standardizes color scheme on splash page
(fix) adds comments for some standardized colors
(fix) adds standardized color scheme to navbar sitter button
(fix) refactors classes to use app.css classes
(fix) adds global button style classes
(fix) updates class names to use app.css classes
Merge pull request #139 from dczarnota/colorTheme

(feat) Standardize color scheme on splash page.