More robust parser to tolerate evil unified diff

CHANGES.rst

 Change log
 ==========
 
+Version 0.9.8 (2016-01-16)
+
+  - More robust parser to tolerate evil unified diff
+
 Version 0.9.7 (2015-04-24)
 
   - Fix unexpected side-by-side output for diff of diff

cdiff.py

 """
 
 META_INFO = {
-    'version'     : '0.9.7',
+    'version'     : '0.9.8',
     'license'     : 'BSD-3',
     'author'      : 'Matthew Wang',
     'email'       : 'mattwyl(@)gmail(.)com',