Merge pull request #111 from tud-zih-energy/marenz.version_2_2

Release v2.2

update old v2 actions introduced when merging win cuda

added more to changelog

Bump version to v2.0

updated README and INSTALL

set new version (#22)

Release 1.7.3

CHANGELOG entries plus code-generator fix

added remark for last fix

FIRESTARTER 1.7

replaced long initialization loops with memcpys of small blocks