fix build without examples, version can contain more than numbers

source/Ox/js/Constants.js

@@ -92,7 +92,7 @@ Ox.SHORT_MONTHS = Ox.MONTHS.map(function(val) {
 //@ Ox.PATH <s> Path of Ox.js
 Ox.PATH = (function() {
     // IE8 can't apply slice to NodeLists, see Ox.slice
-    var index, regexp = /Ox\.js(\?\d+|)$/,
+    var index, regexp = /Ox\.js(\?.+|)$/,
         scripts = document.getElementsByTagName('script'), src;
     for (index = scripts.length - 1; index >= 0; index--) {
         src = scripts[index].src;

tools/build/build.py

@@ -257,7 +257,7 @@ def build_oxjs(downloads=False, geo=False):
                 lambda x: not re.search('^[._]', x),
                 os.listdir(root_path + 'examples/')
             ))
-        ), [])),
+        ), [])) if os.path.exists(root_path + 'examples/') else (),
         'readme': list(map(
             lambda x: {
                 'date': time.strftime(