Apply scripted modifications on an online image
<li>i : image's URL</li>
<li>script : an object in json format. It contains the action as key and the parameters as value.
	<ul>
		<li>[{"grey":""}] : filter grayscale</li>
		<li>[{"pixel":(size,blur])}] : filter pixelate</li>
		<li>[{"emboss":""}] : filter emboss</li>
		<li>[{"edges":""}] : filter edgedetect</li>
		<li>[{"negative":""}] : filter negate</li>
		<li>[{"sketch":""}] : filter mean removal</li>
		<li>[{"gaussian":""}] : filter gaussian blur</li>
		<li>[{"brightness":amount}] : filter brightness</li>
		<li>[{"contrast":amount}] : filter contrast</li>
		<li>[{"colorize":[FF0000,1-127]}] : filter colorize [color,alpha]</li>
		<li>[{"crop":[x,y,w,h]}] : crop image (dimensions in pixels or in %)</li>
		<li>[{"resize":[w,h]}] : resize image. if you put -1 instead of one dimension,it resizes with aspect ratio. {"resize":[256,-1]} calculates the new height</li>
		<li>[{"rotate":angle}] : rotate image</li>
	</ul>
	You can chain various actions in one script: [{"resize":[w,h]},{"colorize":["FF0000",1]},{"rotate":90}]
</li>
<li>script can also be a json file in scripts/ folder
	<ul>
		<li>create a file with your script (ex: {"resize":[w,h],"colorize":["FF0000",1],"rotate":90})</li>
		<li>name your file: myscript.json</li>
		<li>apply it to a picture with ?i=http://www.server.com/picture.jpg&script=myscript (without the json extension)</li>
	</ul>
</li>
<li>dontsave: avoid saving rendered picture</li>
<li>force: force the rendering even if the picture already exists (previous rendering)</li>
<li>help: displays this text</li>
<li>version: displays this api's version</li>
<li>
	picslist: returns the rendered images list in json format
	<ul>
		<li>&random[=xx]: limit the list getting only xx rendered pictures</li>
	</ul>
</li>
<li>download: downloads the php api file</li>