Add barcode plugin

phpgwapi/js/jquery/barcode/changelog.txt

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+2.0.3 - 2013-01-06
+  remove useless code from datamatrix
+  add upc support (Niels Leenheer)
+
+2.0.2 - 2011-03-01
+  integration to jquery updated
+  table B of code 128 fixed (\\ instead of \) thanks to jmcarson
+
+2.0.1 - 2010/09/05
+  CSS fixed to print easily - Thanks to Léo West for this fix
+  datamatrix added - Jonathan Hourez join developper team
+  canvas renderer added    
+  code cleaned
+  fontSize become an integer
+
+1.3.3 - 2009/10/17
+  no wait document is ready to add plugin
+
+1.3.2 - 2009/10/03
+  manage int and string formated values for barcode width/height
+
+1.3 - 2009/09/26
+  bmp and svg image renderer added   
+
+1.2 - 2009/09/10
+  parseInt replaced by intval (nb: parseInt("09") => 0)
+  code128 fixed (C Table analyse) - Thanks to Vadim for the bug report
+
+1.1 - 2009/05/26 
+  std25 fixed

phpgwapi/js/jquery/barcode/readme.md

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+jquery-barcode
+==============
+
+Presentation
+------------
+
+This plugin allows you to display barcodes on your website using jQuery.
+
+Licence
+-------
+[GPL v3](http://www.gnu.org/licenses/gpl.html)
+[CeCILL](http://www.cecill.info/licences/Licence_CeCILL_V2-fr.html)
+
+Features
+--------
+
+### Symbologies
+ - standard 2 of 5 (std25)
+ - interleaved 2 of 5 (int25)
+ - ean 8 (ean8)
+ - ean 13 (ean13)
+ - upc (upc)
+ - code 11 (code11)
+ - code 39 (code39)
+ - code 93 (code93)
+ - code 128 (code128)  
+ - codabar (codabar)
+ - msi (msi)
+ - datamatrix (datamatrix)
+  
+### Output : 
+ - CSS (compatible with any browser)
+ - SVG inline (not compatible with IE)
+ - BMP inline (not compatible with IE)      
+ - CANVAS html 5 (not compatible with IE)