Merge pull request #413 from xi/feature-button-spacing

fix whitespace around buttons
Merge pull request #415 from xi/feature-119-scss-infrastructure++

Feature 119 scss infrastructure++
[scss] split to components
[scss] variables
[scss] use css3 mixins
[scss] own gradient mixins
[scss] rework misc
[scss] adopt forms
[scss] rework forms
[scss] rework type
[scss] rework tooltip
[scss] rework button
[scss] rework conditionals
[scss] rework vote
[scss] rework pager
[scss] rework facet
[scss] rework header
[scss] subheader
[scss] use button styling for subnav
[scss] rework footer