Add bin + open, close + bin spacing styles
Add bin + open, close + bin spacing styles

Summary: Closes T2.

Reviewers: xymostech

Reviewed By: xymostech

Maniphest Tasks: T2

Differential Revision: http://phabricator.benalpert.com/D34

saschatimme/KaTeX,kwangkim/KaTeX,frankandrobot/KaTeX,kwangkim/katex-npm-0.7.0-pre,twitwi/KaTeX,twitwi/KaTeX,kwangkim/katex-npm-0.7.0-pre,spicyj/KaTeX,kwangkim/katex-npm-0.7.0-pre,zhanghuiguoanlige/KaTeX,Khan/KaTeX,franciscop/KaTeX,frankandrobot/KaTeX,saschatimme/KaTeX,gagern/KaTeX,gagern/KaTeX,xymostech/KaTeX,kwangkim/KaTeX,twitwi/KaTeX,Khan/KaTeX,twitwi/KaTeX,kevinbarabash/KaTeX,kevinbarabash/KaTeX,kwangkim/KaTeX,kwangkim/katex-npm-0.7.0-pre,saschatimme/KaTeX,zhanghuiguoanlige/KaTeX,frankandrobot/KaTeX,JetStarBlues/KaTeX,mcanthony/KaTeX,mcanthony/KaTeX,JetStarBlues/KaTeX,azotova/KaTeX,spicyj/KaTeX,mcanthony/KaTeX,saschatimme/KaTeX,franciscop/KaTeX,xymostech/KaTeX,mcanthony/KaTeX,franciscop/KaTeX,kwangkim/KaTeX,franciscop/KaTeX,azotova/KaTeX,frankandrobot/KaTeX,franciscop/KaTeX,JetStarBlues/KaTeX,kevinbarabash/KaTeX,frankandrobot/KaTeX,Khan/KaTeX,JetStarBlues/KaTeX,kevinbarabash/KaTeX,xymostech/KaTeX,gagern/KaTeX,crepererum/KaTeX,xymostech/KaTeX,xymostech/KaTeX,spicyj/KaTeX,spicyj/KaTeX,azotova/KaTeX,gagern/KaTeX,crepererum/KaTeX,kevinbarabash/KaTeX,kwangkim/katex-npm-0.7.0-pre,spicyj/KaTeX,JetStarBlues/KaTeX,zhanghuiguoanlige/KaTeX,azotova/KaTeX,crepererum/KaTeX,crepererum/KaTeX,kwangkim/KaTeX,zhanghuiguoanlige/KaTeX,crepererum/KaTeX,mcanthony/KaTeX,azotova/KaTeX,saschatimme/KaTeX,gagern/KaTeX,zhanghuiguoanlige/KaTeX,twitwi/KaTeX