Agent's XML-Definition

As @Becker-Asano noticed a few weeks ago, there were small errors in the xml-definition for the agent's emotions originating from the conversion of the old format into the xml file. These fixes are included in 6e69302213821c880bb9c43ca9178c86a15736b1.

Additionally, commit fc24bee424c3ea8c5e1769df3e5d1dcd64518f7d contains the addition of a gitignore file used to prevent compilation-specific Qt files and other unnecessary data from being uploaded to the repository.