(#1351) - remove alldbs in node

I'm not sure if you guys are aware but I have a twin browser. When we young my parents were very scrupulous about treating us equally, if one of us needed new shoes, we both got new shoes. The thing was my brother and I are as different as day and a house, not even in the same category of things.  I, even when young, clomped around like a dutch tap dancer while my brother did not meaning I went through shoes roughly 3 times faster then him. Eventually my parents realized (probably due to my brothers massive shoe collection he acquired) that it made no sense to buy us both shoes at the same time and instead just started getting only me shoes. 

The point I'm trying to make is that it's ok to treat different platforms differently. Node.js is not the browser and while there are some very good reasons to have alldbs in the browser, there are less reasons for having them in node and in many ways it's a rather large hindrance to many things. The current solution adds complexity and leads to errors involving file locks while the only proposed solution prevents us from using other leveldb backends.