Merge pull request #17 from boarder2/master

Added expiration timer and tag legend.
fix(chatty): Null pointer when creating new root thread.
feat(chatty): Adjust style/location of expiration timer.
feat(chatty): Add clickable tags in shacktag legend.

Additionally, make the rendering of the table based on data instead of hard coded into the view.
fix(chatty): Hide expire timer for replies.
fix(chatty): Further adjust style of expire timer.