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
Merge pull request #4 from zoloft/master

Removed atob function for IE compatibility
Documentation
fixed error in makefile
Added method visibility
Merge feature branch 'multiple_key_size'
Added basic tests
Added licenses file and a target to concatenate all license in the main one
Refactored web pages for examples, test and demo. Now using bootstrap 3
Replicated README in index.html
fixed test page visual bug
Merge pull request #5 from zoloft/master

Multiple key size support & Async key generation
Updating the readme with the latest way this works, also adding the example.html