added a README file
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+The contents of this MSYS/MinGW system are managed using a Mercurial repository with Mercurial Queues.
+
+For more information about Mercurial and Mercurial Queues see:
+
+http://www.selenic.com/mercurial/wiki/
+http://hgbook.red-bean.com/hgbook.html
+http://hgbook.red-bean.com/hgbookch12.html
+http://hgbook.red-bean.com/hgbookch13.html
+
+
+Here are some hints for using this system:
+
+
+get started
+-----------
+
+run msys.bat
+
+
+show available packages
+-----------------------
+
+$ hg qseries
+
+
+show currently installed packages
+---------------------------------
+
+$ hg qapplied
+
+
+install the next package of the "qseries" list
+----------------------------------------------
+
+$ hg qpush
+
+
+uninstall the last package of the "qapplied" list
+-------------------------------------------------
+
+$ hg qpop
+
+
+install all "default" packages
+------------------------------
+
+$ hg qpush -a
+
+
+show available optional packages
+--------------------------------
+
+$ hg qguard --list
+
+optional packages are the ones that have a "named guard" attached,
+like "+hg" or "+git"
+
+
+enable the installation of optional packages
+--------------------------------------------
+
+$ hg qselect <guard1> [<guard2> ...]
+
+for example:
+
+$ hg qselect hg  -> enables the installation of optional packages for development with Mercurial 
+$ hg qselect git -> enables the installation of optional packages for development with git
+$ hg qselect hg git -> enables installation of optional hg and git packages
+
+after enabling the optional packages, install/uninstall with hg qpush/qpop
+
+
+disable the installation of optional packages
+---------------------------------------------
+
+$ hg qselect --none
+
+
+set a Mercurial username (optional)
+-----------------------------------
+
+open the file /etc/mercurial/hgrc.d/hgrc.rc in an editor and edit the line
+
+; username = myusername <my@email>
+
+then remove the ";" from the line and save the file
