Convert CacheBox's LRU policy to script

Convert this CFC from tags to script:
https://github.com/ColdBox/coldbox-platform/blob/development/system/cache/policies/LRU.cfc

This is a very small CFC. The function bodies are already in cfscript tags, so only the component and function definitions need changed. Change the header to script multi-line comments and move any argument hints into function annotations like so:

/** 
* This is the function hint
* 
* @param This is the argument hint
*/
function ( param ) {}