Do not pretend that EventData is a class

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
More fixes to installer.nsi file

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
Merge pull request #97 from vogel/release-2.1.0

Release 2.1.0