Sling Scripting, again

[Padraic Hannon]

I'd like to update the various ScriptEngineFactories so that they  
provide their services via osgi. This way the registration of  
factories can be done via standard osgi bundle activation. This would  
allow the default script resolver to access Freemarker and the other  
engines, and could be used for microSling as well.

WDYT?
paddy