Version 1.0.1
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  * fixes keystore handling in simple view
Version 1.0.0
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  * implements PDF preview & selecting position of visible signature using mouse
  * adds support for Certificate Revocation Lists (CRL)
  * provides support for selecting hash algorithm (depends on cryptographic provider for selected keystore type)
  * adds keystore types provided by BouncyCastle cryptographic library
  * checks if a certificates are valid and if they're intended for signing
  * includes proxy support for TSA, OCSP and CRL
  * font used in visible signatures can be changed (using conf/conf.properties file) 
Version 0.9.5
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  * support for timestamp server
  * OCSP support
Version 0.9
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  * embedded Unicode font for Layer 2 texts in visible signature (fix for i18n and PDF/A specification)
  * setting font size in visible signature
Version 0.7
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  * support for visible signatures
Version 0.5
-----------
  * support for PDF security (encryption, rights)
  * certification level support
  * "append signature" support
Version 0.2
-----------
  * initial release
  * Adding digitally signatures to (not encrypted) PDFs
  * OpenOffice.org Add-On
  * Swing UI