Merge branch 'master' of https://github.com/lblb/c3 into lblb-master

c3.js

@@ -706,6 +706,7 @@
                         domain = this.orgDomain();
                         return [domain[0], domain[1] + 1];
                     }
+					orgXDomain = domain;
                     _scale.domain(domain);
                     return scale;
                 };