Issue #68 Time picker reflect timezone

Time picker shows timezone event will be saved as.
Events adjust timezone of tv type events.
Issue #68 Use moment timezone to calculate offset

Eastern offset can change depending on time of year and daylight savings
relationship between eastern and greenwich time. Calculate this difference
intelligently instead of using an offset of 300 always.
Issue #22 Block self destruct on no events

When there are no more events in a block, have it remove itself.
Issue #85 Make hyperlink detection more flexible

Accept all characters in second half of a hyperlink.