Handle interrupts; default encoding and nonblocking I/O fix

CHANGES

 Change log
 ==========
 
+Version 0.9.3 (2013-09-28)
+
+  - Moved screenshots to 'gh-pages' branch
+  - Handle all keyboard interrupts more completely
+  - Explicitly set default encoding to utf-8
+  - Fixed broken output diff when I/O with filterdiff in nonblocking mode
+
 Version 0.9.2 (2013-06-21)
 
   - Enahanced option parser now pass unknown option to underneath revision
     control, user can use `cdiff --cached`, `cdiff -U5` directly
 
-
 Version 0.9.1 (2013-05-20)
 
   - Use `--no-ext-diff` to disable GIT_EXTERNAL_DIFF and diff.external which

cdiff.py

 """
 
 META_INFO = {
-    'version'     : '0.9.2',
+    'version'     : '0.9.3',
     'license'     : 'BSD-3',
     'author'      : 'Matthew Wang',
     'email'       : 'mattwyl(@)gmail(.)com',