Add messages for v6.4.4

Add proper flags parsing for cmake (niosus#700)

* Add proper flags parsing for cmake
* Update docs
* Update message

Prepare v6.4.2 (niosus#695)

Prepare v6.4.1 (niosus#691)

Prepare v6.4.0

Prepare v6.3.0

Prepare v.6.2.8

Prepare v.6.2.7

Messages for version 6.2.6

Prepare v.6.2.5