Add feature for creating default constructors and getter/setter methods

[mkstayalive]

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As of now I don't see any feature to create default constructors and getter/setter methods. This would be really helpful.

[spywhere]

This is a feature that I already plan to add in the v2.0.0 (Developers/DevelopersNote.md). However, this would might take a really long time before v2.0.0 to be stable since I barely have time to add a new feature. On the other hand, bug fixes still the first priority that I would invest my time on.

[mkstayalive]

Great to know that this is already planned. This feature would really make Java development faster on Sublime.