Regarding your visa problem, I think by tactful arrangement they will extend, but you know better than me. Otherwise you can come here to India. Or better, why not go to Mauritius and take missionary visa there and at the same time work vigorously: Revision history
Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.