Removed atob function for IE compatibility

The body of the char64ToHex function now return the result of b64tohex function included in base64.js (the Tom Wu's version)
Added gitignore for exluding netbeans project files
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'
Merge branch 'master' into gh-pages

Conflicts:
	index.html