add 'm' state to dirstates

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Hash: SHA1

add 'm' state to dirstates

This state indicates that a file has been merged with resolve and must
be in the next commit.

manifest hash: dc90629b73056b671f7be3de0283039c96c9ca0f
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mercurial/hg.py

@@ -210,6 +210,7 b' class dirstate:'
     def update(self, files, state):
         ''' current states:
         n  normal
+        m  needs merging
         i  invalid
         r  marked for removal
         a  marked for addition'''
@@ -541,6 +542,8 b' class localrepository:'
                             added.append(fn)
                         elif fcmp(fn):
                             changed.append(fn)
+                    elif c[0] == 'm':
+                        changed.append(fn)
                     elif c[0] == 'a':
                         added.append(fn)
                     elif c[0] == 'r':