Ability to annotate reports

[fbcideas_migusr]

Add a capability so that annotations can be added to reports. So that explanations of numbers can be attached to reports. An example might be looking at a report and seeing one number that is particularly low and adding a note that explains this was because that division was closed/flooded/struck by ligtening.

[pabraidy]

It would also be great to be able to attach documents to a Dashboard, such as a Word "User Guide" doc that details the calculation forumlas of the KPI