Creating new annotation to exclude beans fields and classes from the GSON serialization.
Changing to isAnnotationPresent()
Unit tests for @GsonOmitField.
Renaming annotation to SkipSerialization
Adding the documentation example of the new annotation.
Improving the SkipSerialization docs
Merge pull request #763 from progolden/master

Creating new annotation to exclude beans fields and classes from the GSON Serialization