Create vintage.js

/*
author:		ViliusL
version:	1.1
about:		adds vintage effect, functions:
			adjust_color
			lower_contrast
			blur
			light_leak
			chemicals
			exposure
			grains
			grains_big
			optics
			dusts
theory:		Ken, http://stackoverflow.com/questions/13355119/vintage-ing-image-with-javascript/18862003#18862003
libs:		imagefilters.js, url: https://github.com/arahaya/ImageFilters.js
		glfx.js url: http://evanw.github.com/glfx.js/
*/