Testing of Antlr language targets

A few weeks of work, and I finally have a driver generator that can test any grammar with any target.

alias make='mingw32-make.exe'
for i in CSharp Java JavaScript Dart Python3
do
    echo $i
    rm -rf Generated
    dotnet-antlr -t $i
    pushd Generated
    ls
    mingw32-make.exe
    mingw32-make.exe run RUNARGS="-input 1+2 -tree"
    mingw32-make.exe clean
    ls
    popd
done