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Support off-canvas-view on Android <4.4; other <4.4 styling fixes
Improve device classes on body tag

AndroidC = Android < 4.4
AndroidK = Android  4.4+ (<5)
AndroidM = Android 5+

iosC = iOS <7
iosM = iOS 7+

macC = Mac OS X < Yosemite (10.10)
macM = Mac OS X Yosemite+ (10.10+)

Specific version classes are also applied:

android4-4 = Android 4.4.x
ios8 = iOS 8.x
remove innerhtml blank; render will merge the trees for us
Don't type mismatch on empty strings, either
Use replaceChild to merge DOM trees (less flicker)
on/off can now accept arrays of events for the same handler