FIX REMOVE

[Jack Douglas]

When trying to remove data from a group collection.remove(id, 'group') just does not work

[Jamie Pine]

Remove does work, (you were trying to remove from the wrong group, as we debugged)

However here's some things to note that came to my attention while debugging:

• removing from a dynamic group errors, something to do with the dependency graph
• move() does the same as remove() if you don't define a destination
• remove() without a group specified should remove from all groups
• delete() exists and does exactly that