v0.2.0 - Csv export for localization

Hi! I'm here again with an update. This one is an important one.

IMPORTANT:  old files created with this tool's previous versions are incompatible with the new "dialogue manager" script. BUT to make them compatible you just need to load them with this new version and save them again. It was a thought decision to make it this way, but I kinda believe that nobody uses this tool but me, so I'm the only impacted user... I'll probably make it retro-compatible in the future for good practices.

Changes:

• You can export a CSV file ready for the localization of the dialogue. The csv will contain a list of tags of the localizable lines. Tags will be assigned based on: node creation order or node name, and line position. For a more stable and understandable localization, the best approach is to name the nodes.
• You can use conditional blocks with choices.