Translate Java member variables into Objective-C

properties with Property annotation. For example:
```
class Foo {
    @Property("copy, nonatomic") protected String bar;
}
```
translates to:
```
@interface Foo : NSObject {
}

@property (copy, nonatomic) NSString *bar;

@end

@implementation MyClass

@synthesize bar = bar_;

@end
```