Update unicodedata module

Module unicodedata needs to be updated:

• It currently provides Unicode Data 5.2.0. Python 3.4 provides Unicode Data 6.3.0, so the data needs to be updated.
• The script to convert Unicode Data downloaded from the Unicode Consortium's website to an embedded resource (genunicodedata.py) is written in Python 2. Needs to be converted to Python 3.
• The project needs to contain the Copyright and Permission Notice from Unicode Consortium, to satisfy the usage and distribution requirements. Probably including the clause in the Documentation folder will be sufficient.
• Python also provided Unicode Data 3.2.0, for those applications that need to conform to IDNA 2003. The current IronPython unicodedata module simply aliases the 5.2 database as 3.2. This needs to be corrected and the proper 3.2.0 database needs to be provided. The Unicode Data 3.2.0 is in a different format than 6.3.0, so a new conversion script needs to be written.

Start by reading genunicodedata.py and the existing unicodedata module to understand how Unicode Data 5.2.0 is converted and embedded. Compare the required 6.3.0 and 3.2.0 source formats, convert the script to Python 3, add the Unicode Consortium notice in the Documentation folder, and verify that both databases are provided rather than aliasing 3.2 to 5.2.