Rename variables from @size-# to @size#
Rename variables from @size-# to @size#

Match the naming styles used for the css styles in the variable names.

Test Plan:
 - Make sure `x\Huge x \tiny x \Huge x` renders correctly.
 - Make sure the huxley tests stay the same

Auditors: alpert

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