Escape special characters in beer name

[elcojacobs]

Script crashes when slashes or # is used in the beer name.

[vanosg]

Elco, I did a little more research on this-

The issue, on *nix atleast, is only the / and \0 characters (the only non-allowed characters in a file path, which is the error being generated). When the script tries to write the beer name My/Beer, BrewPi uses the name as part of the filename /the/path/to/My/Beer - you can see how BrewPi then gets confused:
named used: a/b\c#d
IOError: [Errno 2] No such file or directory: '/home/brewpi/data/a/b\c#d/a/b\c#d-2014-07-10.json'

and \ are fine as far as I can tell (and research suggests they should be):

Jul 10 2014 20:57:06 Notification: Restarted logging for beer 'omg###'.
Jul 10 2014 20:57:53 Notification: Restarted logging for beer 'omg\kk'.
No errors. ^^^

I'm patching to simply replace the / with a _ . It is not possible to escape a / in a filepath in *nix. The PR is on its way

Note: When it comes to Windows, there's TONS of disallowed chars, and even combos of chars, and would probably need a re-write of how we store data files to properly address that. For now, adding a note in the docs (or on the UI) is likely the best use of time.