Rearrange event type information to avoid duplication.
Add libkunquat interface for retrieving event type information.
Add Python API support for retrieving event type information.
Make get_event_info interface more flexible.
Add Kunquat event information module to the Python API.
Merge pull request #264 from kagu/event_info

Event info
Add generic field input support to the sheet.
Use default event argument value as suggested input on new trigger arguments.
Select suggested trigger argument text when entering argument input.
Fix trigger argument example values.