[File] Update magic entries

[Gregory Lepore]

With a ton of help from Jason Summers I have updated my collection of 
1,200 new magic entries for file. I have updated each entry to include 
links to the supporting documentation I used to create the signatures. 
The file now passes Jason's mgcchk script and all entries have been tested.

I would like to find out the best way to get these signatures verified 
and into 'file'. I don't think anybody wants 1,200 separate emails/bug 
reports for each of the entries (but I will do it if needed.)

The magic file (lepore_magic) is at:

https://github.com/glepore70/pronom-research/tree/master

along with sample files and supporting documentation for every new entry 
in the sample_files directory. Also included are the signatures in 
PRONOM format.

I've also uploaded a helper script, combomask.py which generates a basic 
file or PRONOM formatted entry based on an analysis of files in ./.

Thanks.