Updated .gitignore
Added IntelliJ module
Added example setup-env Powershell script
Updated example usage
Updated README.md
Fixed date parsing and duration price calculation.

* Date parsing didn't include time :)
* Incorrectly using the next price sample as the price over this time range.
Added parameter to output comma separated values (instead of tabs)
Added initial test cases
Added summarize support for instance types across all availability zones

* Added OptParser
* Extract region from data