reorganized code and changed config.xml format

- Mod configuration attributes moved to WeldingConfiguration.cs
- config.xml processing moved to FileManager.cs
- config.xml format changed to UNITY serialized
- some minor changes like typo corrections
Stock Toolbar integration

Stock toolbar integration & some GUI code reorganization
Attachnode orientation fix

Alewx, describe please, if you still remember that it is fixes :)
Major changes in processing of the modules

a some description would be appropriate here
Formatting changes

Just a cosmetic update - spaces at the beginning of lines have been
replaced by tabs
fix for broken bool attributes

- fix for broken bool attributes
- node orientation vector rounding change
Merge pull request #13 from Alewx/al-test3

Major Update of config.xml, toolbar integration, modulemerging, formatting