refactoring: extracted assign(), getConfig()

Firefox supports "filter: drop-shadow" -> deprecated SVG rendering

v1.3.4: specific constant angle for shadows

v1.3.3: Flat Shadow & updated demo

v1.3.2: Custom Colors & updated demo

v1.3.1 & updated demo

v1.2.1: Inverse Direction, .reset() and minor fix

no jQuery dependence, CommonJS and AMD support

v1.1.0

possibility to update shadows during/after jQuery animations
optimizations
corrected shadow positions