added viewCommandsManager for binding to bracket view commands (ie: fontSizeChange)
added handler for brackets fontSizeChange to set lineHeight and fontSize using its calculations
added lineHeight setting to generalSettings and general settings view
reverted line height changes
pulled 12 into defaults.js / FONT_SIZE so it can be used to calculate the offset
setting fontSizeAdjustment in viewState to offset number before binding fontSizeChange event
setting fontSizeStyle to saved fontSize setting before binding fontSizeChange event for sprint > 37 compatibility
using defaults.js / FONT_SIZE in generalSettings.js for default fontSize
allowing negative number for offset
fixed typo
Merge pull request #46 from bradgearon/master

syncing font size / line height with brackets (to fix ctrl +/-)