Update release-notes.md

Added the command to stop HSQLDB.
new: add clj-json dependency
Fixed a bug in pom.py
Fixed #13
Added release notes for v2.3.5
update plugin version
Update release-notes.md
Update parent version for release
[maven-release-plugin] prepare release SlipStream-2.3.5
[maven-release-plugin] prepare for next development iteration
Update parent version after release
Added release notes for v2.3.6
Update parent version for release
[maven-release-plugin] prepare release SlipStream-2.3.6
[maven-release-plugin] prepare for next development iteration
Update parent version after release
Merge branch 'master' into ss-install-script