Fixed rotation of welder part by 1 degree
introduced user-selectable level of debug details

Now Main window has option "Advanced Debug".
If enabled, mod produces detailed output to ksp.log
Option is disabled by default.
In code you should use AdvDebug (at the moment is available in Welder
class only); see examples in Welder.weldThisPart
fixed processing of incorrectly specified model files

processing of incorrectly specified model files was wrong in case path
to model file contains name of part
For example
NearFuture/Parts/LargeTruss/trusslrg-adapter-25/trusslrg-adapter-25
transforms to
NearFuture/Parts/LargeTruss/trusslrg-adapter-25-25/trusslrg-adapter-25