Added setters functions + fixed null attributes handling
Added setters functions + fixed null attributes handling

lawrence200801/ocilib,vrogier/ocilib,Convey-Compliance/ocilib,kornefalk/ocilib2017,alexeyvo/ocilib,vrogier/ocilib,ljx0305/ocilib,vrogier/ocilib,alexeyvo/ocilib,Convey-Compliance/ocilib,ljx0305/ocilib,kornefalk/ocilib2017,alexeyvo/ocilib,lawrence200801/ocilib,lawrence200801/ocilib,Convey-Compliance/ocilib,vrogier/ocilib,ljx0305/ocilib,kornefalk/ocilib2017