Allow = in factoid names.

[ghost]

Currently oftn-bot doesn't seem to allow equals signs in factoid names (except in one special case). Consider the following:

!learn == = foo
!learn "a=b" = bar
!learn a=b = baz

I would have expected at least one of the above to Do The Right Thing™, but all do something, from my perspective, unexpected. The first creates a factoid whose name is =, the second "a, and the third a\. Please consider allowing of escaping equals signs in some manner.