Enhancement: XLSB support in read_excel() 
openpyxl and xlrd do not support XLSB. I'm curious if anyone has taken a look at integrating (more like creating) the functionality into Pandas. Looks like it could be a Python package in it self. 

Spec from Microsoft:
http://msdn.microsoft.com/en-us/library/cc313133(v=office.12).aspx
