Refactor Config into ConfigXmlParser, CordovaPreferences

Intention here is to be 100% backwards compatible.
Delete "CB-3064: The errorUrl is..." Log message left over from debugging presumably
Update .classpath to make Eclipse happy (just re-orders one line)
Delete dead code from CordovaActivity
Merge branch 'master' into 4.0.x (ConfigXmlParser breakout)

Conflicts:
	framework/src/org/apache/cordova/CordovaActivity.java
	framework/src/org/apache/cordova/PluginManager.java