mod: task-log throws errors, if start-complete order is violated.
mod: task-log sets default name 'no-name-task', when task with no name is given.
add: task-log event-name caching for faster search access.
add: console logging for different event fallbacks.
add: events do not start again if they were up to a certain number ago already started.
fix: selecting fallback events ignores task-log's caching.
mrg: prepare for merge with master.
mod: fallback event description more pausible with regards to outcome.