add 1.16.0 to changelog

add SilverStripe-module to third-party integrations

closes heiseonline#91

update changelog to 1.14.0

fix typo

Enable customization of subject and body in mail service (fixes heise…

…online#58)

release v1.10.1

Merge pull request heiseonline#55 from nyze2oo9/patch-1

Update README.md

Prevent mailto links from opening new tabs. Fixes heiseonline#49

make release.sh executable

release v1.9.2