v0.0.18

Changelog

9a5ee0a add DebugJSON utility logging function
f0592ea add file and dir attributes to resource properties for file linters
8e98146 add is-array, is-not-array ops
599175e add starts-with, ends-with operators
8a59f38 add test to lint the built in rules
4cd4543 improve docs
23b23be terraform linter now loads modules