Add tests for branch limiting
Add depth limiting for branched values
Skip nil assignments inside branches when merging
Add more methods to check for command injection

closes #206 finally
Refactor ignored output in XSS check
Re-ignore HAML escape method
Fix Haml interpolation test

should have been a test that the warning does _not_ appear.
Merge branch 'more_command_injection_methods'

Add more methods to check for command injection
Merge branch 'limit_branched_value_depth'

Limit branched value depth, add --branch-limit option
Update changes