The release build of Cura v15.04.6

Warning: Update changedFiles.txt before trying to exporting py files for windows and mac build. Use the following command to get changed files from this repo.

rm changedFiles.txt ; date >> changedFiles.txt ; git diff --name-status 3cfa6a85c8dd56d333d01aa291f0332236d0b0d9 {--recent commit hash --} >> changedFiles.txt