Added asn1 encoder from jsrasign
Added support for different key sizes
Compilated
Removed unused yahoo yui library, just copied the function needed to extend classes from YAHOO.lang (YAHOO.lang.extend)
Added public method for public/private key retrieval without BEGIN/END headers and wordwrap at 64 chars
Documentation
fixed error in makefile
Added method visibility
Merge feature branch 'multiple_key_size'