When constant YII_DEBUG and CAsssetManager::$linkAssets are both setted as ture, then will cause the following error.
The "forceCopy" and "linkAssets" cannot be both true.
fix conflict with CAssetManager::$linkAssets
Now not YII_DEBUG in function used, see $forceCopyAssets (!defaults to false).
No need to merge now.
Use not master brunch, see 1.0.6