Added

• #164: Adding function to get unix epoch for a time (@mattfarina)
• #166: Adding tests for date_in_zone (@mattfarina)

Changed

• #144: Fix function comments based on best practices from Effective Go (@CodeLingoTeam)
• #150: Handles pointer type for time.Time in "htmlDate" (@mapreal19)
• #161, #157, #160, #153, #158, #156, #155, #159, #152 documentation updates (@badeadan)