Now all modules are in core modules folder

modules/advagg/advagg_css_compress/css-compressor-3.x/README.md

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+[CSS Compressor](http://www.codenothing.com/css-compressor/)
+============================================================
+
+CSSCompression is a PHP based CSS minifier that analyzes stylesheets for various compressions.
+It finds possible CSS shorthand techniques for combination of properties.
+
+
+Usage
+-----
+
+	require( 'src/CSSCompression.inc' );
+	$compressed = CSSCompression::express( $css, 'sane' );
+
+
+Or, if you need to run it multiple times
+
+	$CSSC = new CSSCompression( 'sane' );
+	$compressed = $CSSC->compress( $css );
+
+
+Modes
+-----
+
+Modes are pre-defined sets of options that can be set by passing in the mode name.
+
+ - **safe**: (99% safe) Safe mode does zero combinations or organizing. It's the best mode if you use a lot of hacks.
+
+ - **sane**: (90% safe) Sane mode does most combinations(multiple long hand notations to single shorthand), but still keeps most declarations in their place.
+
+ - **small**: (65% safe) Small mode reorganizes the whole sheet, combines as much as it can, and will break most comment hacks.
+
+ - **full**: (64% safe) Full mode does everything small does, but also converts hex codes to their short color name alternatives.
+
+
+Here's a few different ways to initiate a mode.
+
+	// Express with safe mode
+	$compressed = CSSCompression::express( $css, 'safe' );
+
+	// Creating new instance with sane mode
+	$CSSC = new CSSCompression( 'sane' );
+
+	// Setting an instance with small mode
+	$CSSC->mode( 'small' );
+
+	// Or compressing with the current instance, and setting full mode
+	$compressed = $CSSC->compress( $css, 'full' );
+
+
+
+Singleton Instances
+-------------------
+
+Yes the compressor provides singleton access(separate from express), but use it wisely.
+
+	$CSSC = CSSCompression::getInstance();
+
+	// Or, if you want to keep named instances
+	$rose_instance = CSSCompression::getInstance('rose');
+	$blue_instance = CSSCompression::getInstance('blue');
+
+
+Option Handling
+---------------
+
+The compressor has an option function with multiple functionalities.
+
+ - If no arguments are passed in, the entire options array is returned.
+
+ - If a single name argument is passed, then the value of that key name in the options array is returned.
+
+ - If both a name and value are passed, then that value is set to it's corresponding key in the array.
+
+Usage
+
+	// Returns entire options array
+	$options = $CSSC->option();
+
+	// Returns the readability option value
+	$readability = $CSSC->option( 'readability' );
+
+	// Sets the readability to non-readable
+	$CSSC->option( 'readability', CSSCompression::READ_NONE );
+
+Alternatively, you can use direct access methods
+
+	// Direct access to options array
+	$options = $CSSC->options;
+
+	// Direct access to readability option value
+	$readability = $CSSC->readability;
+
+	// Direct setting of readability value
+	$CSSC->readability = CSSCompression::READ_NONE;
+
+Additionally, a reset function is provided to revert back to base options (decided at runtime).
+
+	// Resets options to original values
+	$CSSC->reset();
+
+
+
+Readability
+-----------
+
+The compressor class provides static integers that map to the internal readability values
+
+	CSSCompression::READ_MAX // Maximum Readability
+	CSSCompression::READ_MED // Medium readability of output
+	CSSCompression::READ_MIN // Minimal readability of output
+	CSSCompression::READ_NONE // No readability of output (full compression into single line)
+
+	// To set maximum readability (Assuming you have your own instance)
+	$CSSC->option( 'readability', CSSCompression::READ_MAX );
+
+	// Or, just pass it in as another option
+	$options = array(
+		'readability' => CSSCompression::READ_MAX,
+		// Other options ...
+	);
+	// Get full readability through express
+	$compressed = CSSCompression::express( $css, $options );
+
+
+Contributors
+------------
+[Corey Hart](http://www.codenothing.com) - Creator
+
+[Martin Zvarík](http://www.teplaky.net/) - Pointed out the url and empty definition bug.
+
+[Phil DeJarnett](http://www.overzealous.com/) - Pointed out splitting(and numerous other) problems
+
+[Stoyan Stefanov](http://www.phpied.com/) - [At rules writeup](http://www.phpied.com/css-railroad-diagrams/) and test suite help.
+
+[Julien Deniau](http://www.jeuxvideo.fr/) - Pointed out escaped characters issue
+
+[Olivier Gorzalka](http://clearideaz.com/) - Strict error warnings cleanup