generateAccessorMethods in GVUserDefaults.m generate unnecessary accessor methods

[NazgulLee]

generateAccessorMethods in GVUserDefaults.m not only generate accessor methods for properties in user custom categories, but also generate accessor methods for properties in GVUserDefaults.m itself, namely mapping and userDefaults. Probably this is unnecessary?

[kevinrenskers]

You're probably right :)
Would you like to submit a PR to fix this?

[NazgulLee]

Yes, I'd love to have a try. And sorry for replying so late, cause I'm not very familiar with Github yet :)