.gitignore: Ignore tmp/ directory

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
scripts: Add update-site

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Update doc/release-notes/1.4

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Update doc/release-notes/1.5

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>