Pack of fixes.
Fixes
- file_stats will acknowledge issues excluded by configuration #299
- W1007 (uneven-indent) should not report comments as rule volations #296
- W1007 (uneven-indent) should parse IFs #297
- Robocop API should load configuration file #302
- If there is invalid configuration while using Robocop API, it will throw InvalidArgumentError instead of SystemExit #303