[re-create] Add BigInteger sanity checks for VM

[ixje]

deleted old repo, re-creating PR

What current issue(s) does this address, or what feature is it adding?
Closes #566 and adds feature parity with C# on BigInteger checking: C# ref

How did you solve this problem?
write code.
Requires:
CityOfZion/neo-python-core#81
and
CityOfZion/neo-boa#106

How did you make sure your solution works?
make test and run node for a while

Are there any special changes in the code that we should be aware of?
no
Please check the following, if applicable:

• Did you add any tests?
• Did you run make lint?
• Did you run make test?
• Are you making a PR to a feature branch or development rather than master?
• Did you add an entry to CHANGELOG.rst? (if not, please do)

[coveralls]

Coverage decreased (-0.03%) to 82.019% when pulling a69e119 on ixje:vm_biginteger into 1b6b4a0 on CityOfZion:development.