##CHANGELOG
- If used as a library, the exit code is now passed to the callback function
- Header names are now converted to title case (Content-Type, instead of content-type)
- An explicit iteration count overrides the data-file
- No separate global file is needed to use global variables
- Https requests are now handled by newman.
- Form data can now be taken from data files
- No separate environment file needs to be specified to use env. variables
- Wrong env file paths print a human-readable error message
- "http://" is prefixed to urls without (if not already present)
- Data files do not overwrite all env properties
- Can run only folders by specifying -f
- Pre-Request scripting