move current qt specific readme to doc/, restore original README.md

README.md

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+
+Bitcoin integration/staging tree
+
+Development process
+===================
+
+Developers work in their own trees, then submit pull requests when
+they think their feature or bug fix is ready.
+
+If it is a simple/trivial/non-controversial change, then one of the
+bitcoin development team members simply pulls it.
+
+If it is a more complicated or potentially controversial
+change, then the patch submitter will be asked to start a
+discussion (if they haven't already) on the mailing list:
+http://sourceforge.net/mailarchive/forum.php?forum_name=bitcoin-development
+
+The patch will be accepted if there is broad consensus that it is a
+good thing.  Developers should expect to rework and resubmit patches
+if they don't match the project's coding conventions (see coding.txt)
+or are controversial.
+
+The master branch is regularly built and tested, but is not guaranteed
+to be completely stable. Tags are regularly created to indicate new
+official, stable release versions of Bitcoin. If you would like to
+help test the Bitcoin core, please contact QA@Bitcoin.org.
+
+Feature branches are created when there are major new features being
+worked on by several people.