Porting VST model to 0.6 - #358, #735

- Adding javascript that provides list of installed plugins
- Adding javascript dealing with address of subscribed parameter
- Adding javascript for populating menu used to choose what range of parameters to access within the default view
- Preventing parameter feedback and stack overflow without having one param block simultaneous updates to other params
Merge with conflicts resolved
Merge (with conflicts to be resolved) - part II