Remove deprecated response keys and update API definition.

Progress on #24.
Add reload reason code and text to the reload event.
Merge pull request #57 from DavidCPhillips/master

Add reload reason text with an error number to the reload event.
Add missing JSDoc for ReloadReason and update the missing reason entry
into the EventDetail typedef.
Merge pull request #62 from DavidCPhillips/master

Add missing JSDoc for spf.nav.ReloadReason.
Merge pull request #59 from nicksay/remove-deprecated-response-keys

Remove deprecated response keys and update API definition.