Renamed transactions.go to events.go
Minor changes StreamServer method names and type names
Get rid of decode.go and replace with much simpler interface
Limit export of helper types and methods.  Some more documentation
More documentation.
Add example and fix code in README.  Change visiblity of Price- & Event
servers so that methods are visible in docs.
More documentation changes
Small doc change
Add support for labs calendar
Skip labs test if env FXPRACTICE_TOKEN is not set
Add support for service status
Add some documentation to status api