Add in float(instance) in maximum validator
All tests pass when adding `float()` conversion on `instance` and `maximum` and `minimum` in respective validators
Closes maximum issue which wasn't an issue.
Remove float conversion on minimum validator to make it work for very negative numbers
Squashed 'json/' changes from abdd47f..3cef243

3cef243 Applies to Draft4 as well.
f323723 Check comparisons for very negative numbers as well.
c73cf22 Merge pull request #60 from gilesbowkett/added-jsck-to-who-uses-it
e77c86a jsck uses JSON Schema Test Suite
1a96775 Merge pull request #57 from tanaka-tatsuya/fix/max-length-test-case
b124928 fixed maxLength test case

git-subtree-dir: json
git-subtree-split: 3cef243acce1290c8bbbc546f7f3fcbd6c10ff8b
Merge commit '43075285ed7271d9caaa02caa1747ead3cbb27ef'

* commit '43075285ed7271d9caaa02caa1747ead3cbb27ef':
  Squashed 'json/' changes from abdd47f..3cef243
Merge remote-tracking branch 'sebastianmika/master'

* sebastianmika/master:
  Closes maximum issue which wasn't an issue. Remove float conversion on minimum validator to make it work for very negative numbers
  All tests pass when adding `float()` conversion on `instance` and `maximum` and `minimum` in respective validators
  Add in float(instance) in maximum validator