#20420 Re-encode mainsection images to JPEG if uploaded in BMP or TIFF

git-svn-id: https://svn.eionet.europa.eu/repositories/Naaya/trunk/eggs/naaya.chm@21098 a0171fae-0946-0410-966d-b1775066cd26
released 3.0.27, new version 3.0.28

git-svn-id: https://svn.eionet.europa.eu/repositories/Naaya/trunk/eggs/naaya.chm@21099 a0171fae-0946-0410-966d-b1775066cd26