figures: fit width where make sense
Architecture: add PodsView and friends, outline web
Architecture: web overall arch
Architecture: add high level arch
Architecture: design requirements
tree-wide: figures: prefer here
needs further tweaks after finalizing test, but let's use here for now
toc: remove vertical spacing tweaks
too much with current line spacing, and the difference among types is
not really noticeable
Backgrounds: kubernetes: add authn
RelatedWorks: cscloud: cons
Introduction/Backgrounds: KaaS-ify
RelatedWorks: brief intro to cscloud history
Backgrounds: kubernetes: builtin and custom admission control
Backgrounds: kubernetes: brief intro to rbac and admission control
outline overall and kubernetes, move csloud to related works