Remove 'Trivial Drive' idea config file from repo.
Refactor OpenIabHelper.Options.
Minor fixes.
Add docs.
Minor fix in docs.
Revert Options to support old version.
Change sample to use OpenIabHelper.Options.Builder.
Change README.md.
Minor fixes in OpenIabHelper.Options.
Merge last changes from master.
Merge pull request #265 from kirich1409/options_builder

Options builder