[Module] Timestamp on Feed, Notification, Comment and Activity

[luna-ci]

Format Timestamp Condition

• [x] <= 1 min use "Just Now"
• [x] > 1 min & < 60 mins use "X/XX mins ago " (X is number of digit 1 or 2 digits)
• [x] >= 60 mins & < 2 hrs use "X hr ago"
• [x] >= 2 hrs & < 12 hrs use "XX hrs ago"
• [x] >= 12 hrs & < 24 hrs use "Today at HH:MM"
• [x] >= 24 hrs & < 48 hrs use "Yesterday at HH:MM" (HH is 24 hours)
• [x] >= 48 hrs use " Day Month at HH:MM"

[katopz]

@karrung use moment