LDEV-2261 Setting a flag in gradebook activities so that they can be updated more than once if hte request comes from an external source like a tool. If it is set in gradebook, the flag is set so it cant be updated from an external source again
LDEV-1891: Add an advanced option: monitoring teachers get notified when a student submits an assignment/resource/survey answer.Removed duplicate key names in the database models.
LDEV-1707: Converted marks to floats, to allow marks like 7.5. Also I18N'd the output of the marks so that they are shown as 1,234.5 or 1 234,5 depending on the user's locale.