Add IP filter sign BC9037 to filter IP ranges

Related to #8.

This commit introduces two new signs: BC9037 and BC9137.

- BC9037: on = range start <= vehicle IP <= range end
- BC9137: on = !(range start <= vehicle IP <= range end)

The basic layout of this sign is the following:

1. Empty
2. [BC9x37]
3. AA.BB.CC
4. XX.YY.CC

Line 3 and 4 are the range start and end respectively.