0.5.0beta3, and work around maven-release-plugin's stupidity

Namely: this idiotic plugin clones the entire repository again to perform a
release (it doesn't know about git archive, it seems) and creates nonsense
commits in the process.

I don't want either of those to happen, so .git/config edit by hand it is to use
a local bare clone instead.

Fix bug with divisibleBy, and also other numeric keywords

The problem was with JsonNode's .canConvertToLong() method. The doc explicitly
said, and I overlooked it, that:

	[...] floating-point numbers are convertible if the integral part fits
	without overflow

Introduce a valueIsLong() helper method in NumericKeywordValidator which
validates that the node type is indeed an integer, and only then try and see if
node.canConvertToLong().

Version 0.5.0beta1

[maven-release-plugin] copy for tag 0.4.1

[maven-release-plugin] copy for tag 0.4

[maven-release-plugin] copy for tag 0.3

Version 0.2.1

Version 0.2

Version 0.1.1

Version 0.1