Update __init__.py

fix:fxsjy#300
when jieba.cut(sentence,HMM=False),chinese and english characters mixed with whitespace can be also ouput.
userdict:
Edu Trust认证 2000
jieba.cut("我通过了Edu Trust认证",HMM=False)
output：我, 通过, 了, Edu Trust认证

jieba/__init__.py

@@ -38,9 +38,9 @@
 
 re_eng = re.compile('[a-zA-Z0-9]', re.U)
 
-# \u4E00-\u9FD5a-zA-Z0-9+#&\._ : All non-space characters. Will be handled with re_han
+# \u4E00-\u9FD5a-zA-Z0-9+#&\._ : words and whitespace characters and ':' and '-'. Will be handled with re_han
 # \r\n|\s : whitespace characters. Will not be handled.
-re_han_default = re.compile("([\u4E00-\u9FD5a-zA-Z0-9+#&\._]+)", re.U)
+re_han_default = re.compile("([\u4E00-\u9FD5a-zA-Z0-9+#&\._\-\: ]+)", re.U)
 re_skip_default = re.compile("(\r\n|\s)", re.U)
 re_han_cut_all = re.compile("([\u4E00-\u9FD5]+)", re.U)
 re_skip_cut_all = re.compile("[^a-zA-Z0-9+#\n]", re.U)