Working with the command \fbox or \fcolorbox, one has to
handle page breaks by hand. The present package defines the
environment mdframed which automatically deals with page breaks.

Author's name: Marco Daniel and Elke Schubert (!new)
License type: lppl

changes in version 0.4a:
- fixes bug in fontcolor (Elke Schubert)

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changes in version 0.4:
- second author Elke Schubert
- fixes some bugs 
   - calculation of the page dimen
- using tikz for the frame with different styles


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changes in version 0.3b:
- fixes some bugs -- thanks to Dr. Dietrich Grau
- added new options: ntheorem

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changes in version 0.3a:
- added new options: leftmargin and rightmargin
- fixes some bugs
