Add missing files to MANIFEST.in
Add missing files to MANIFEST.in

 - cpuinfo.py is a new addition that was forgotten
 - blosc_filter.h was missing because of a typo

FrancescAlted/PyTables,PyTables/PyTables,avalentino/PyTables,avalentino/PyTables,FrancescAlted/PyTables,FrancescAlted/PyTables,PyTables/PyTables,PyTables/PyTables,avalentino/PyTables