fix(common): use modular scale to define font sizes
fix(*): impose a standard for page headings and content sections
fix(common): reorganize base .styl spacing and typography

This implements standard font sizes, alignment and spacings across all pages.
Closes #86
feat(common): add styles for blockquotes
fix(projects): adjust Project.relevant_fact @ Project Details
fix(projects): fix Project .tags font-size
fix(feedback): clean up Feedback Create template
fix(common): fix form labels font weight
fix(accounts): clean Edit* page titles
Merge pull request #98 from brasilcomvc/fix/outline-styles

Fix: outline styles