Ezpdfviewer 2.0

Change logs:

V 2.0 :
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* rewrited all the code trying to respect ez coding standards
* created a class to handle pdf to flash conversion
* added a context parameter to handle edit mode or view mode .
* added a fullscreen parameter to handle edit mode or view mode .To
display viewer in fullscreen with no pagelayout if needed
* the extension does not open new windows anymore on flashviewer in create/view mode
* the width and height of the swfapplet is now configured from
ezpdfviewer.ini
* errors handled properly, logging the pdf2swf tools error in log file