Add CodeFix "Wrap in Using"

[BADF00D]

If an undisposed object is detected, there should be a possibility to wrap this in a using statement via CodeFix. There are several situation that should be treated differently:

An undisposed local variable

namespace SomeNamespace {
    public class SomeClass(){
        public void SomeClass(){
            var mem = new MemoryStream();
            mem.Write(...)        
        }
    }
}

Should become:

namespace SomeNamespace {
    public class SomeClass(){
        public void SomeClass(){
            using(var mem = new MemoryStream()){
                mem.Write(...);
            }
        }
    }
}

An undisposed anonymous variable

namespace SomeNamespace {
    public class SomeClass(){
        public void SomeClass(){
            new MemoryStream();
        }
    }
}

Should become:

namespace SomeNamespace {
    public class SomeClass(){
        public void SomeClass(){
            using(new MemoryStream()){
            }
        }
    }
}

An undisposed anonymous variable within an ctor call of a class that is not tracking

namespace SomeNamespace {
    public class SomeClass(){
        public void SomeClass(){
            using(var reader = new NonTrackingReader(new MemoryStream()){

            }
        }
    }
}

Should become:

namespace SomeNamespace {
    public class SomeClass(){
        public void SomeClass(){
            using(var somename = new MemoryStream()){
                using(var reader = new NonTrackingReader(somename){

                }
            }
        }
    }
}

[BADF00D]

Will be part of release 0.39