Update Changelog for 0.4.2 release.
Update Changelog for 0.4.2 release.

Signed-off-by: Dan Dennedy <2591e5f46f28d303f9dc027d475a5c60d8dea17a@dennedy.org>

rayl/MLT,wideioltd/mlt,j-b-m/mlt,ttill/MLT-roto,rayl/MLT,siddharudh/mlt,zzhhui/mlt,ttill/MLT,j-b-m/mlt,ttill/MLT-roto-tracking,wideioltd/mlt,anba8005/mlt,xzhavilla/mlt,anba8005/mlt,ttill/MLT-roto-tracking,rayl/MLT,wideioltd/mlt,ttill/MLT-roto,ttill/MLT-roto-tracking,zzhhui/mlt,ttill/MLT-roto-tracking,mltframework/mlt,ttill/MLT,ttill/MLT-roto-tracking,rayl/MLT,xzhavilla/mlt,ttill/MLT-roto,j-b-m/mlt,gmarco/mlt-orig,gmarco/mlt-orig,ttill/MLT,xzhavilla/mlt,rayl/MLT,wideioltd/mlt,gmarco/mlt-orig,ttill/MLT-roto,j-b-m/mlt,rayl/MLT,siddharudh/mlt,wideioltd/mlt,gmarco/mlt-orig,ttill/MLT-roto,ttill/MLT-roto,ttill/MLT,wideioltd/mlt,zzhhui/mlt,ttill/MLT-roto,j-b-m/mlt,wideioltd/mlt,j-b-m/mlt,j-b-m/mlt,siddharudh/mlt,zzhhui/mlt,xzhavilla/mlt,anba8005/mlt,ttill/MLT-roto-tracking,mltframework/mlt,mltframework/mlt,mltframework/mlt,anba8005/mlt,mltframework/mlt,xzhavilla/mlt,ttill/MLT-roto-tracking,ttill/MLT,ttill/MLT,ttill/MLT-roto,xzhavilla/mlt,xzhavilla/mlt,j-b-m/mlt,anba8005/mlt,j-b-m/mlt,siddharudh/mlt,gmarco/mlt-orig,mltframework/mlt,ttill/MLT-roto-tracking,ttill/MLT-roto,zzhhui/mlt,ttill/MLT,mltframework/mlt,anba8005/mlt,ttill/MLT-roto-tracking,siddharudh/mlt,zzhhui/mlt,zzhhui/mlt,gmarco/mlt-orig,siddharudh/mlt,zzhhui/mlt,anba8005/mlt,wideioltd/mlt,mltframework/mlt,anba8005/mlt,anba8005/mlt,wideioltd/mlt,gmarco/mlt-orig,rayl/MLT,gmarco/mlt-orig,siddharudh/mlt,gmarco/mlt-orig,ttill/MLT,siddharudh/mlt,j-b-m/mlt,ttill/MLT,rayl/MLT,zzhhui/mlt,xzhavilla/mlt,mltframework/mlt,siddharudh/mlt,xzhavilla/mlt,mltframework/mlt