fix NPE in ModuleLoader
build script for contrib
deleton: move gtext, old xmls, deprecated execution to contrib virtual folder
deleton: build script for gtext and xml in contrib
deleton: move deprecated execution
deleton: move some old runconfigs stuff to contrib
deleton: add some deps
deleton: fix stuff
deleton: remove old build scripts, rebuild build.sandbox
deleton: remove execution.migration
run generators runner
deleton: fix execution-languages plugin.xml
upgrade persistence to v8
rebuild required
add contrib build to gitignore
deleton: build contrib build
upgrade model persistence
rebuild
fix startup language dependencies
move xml and gtext to mps-xml-obsolete plugin