added some libraries to link with for generateStructuredQuadMesh, added new programme createMeshElemPropertiesFromASCRaster

added public method Raster::getRasterPixelDistance(), bugfix for Raster::refineRaster() - update now internal attributes

changed dropFileExtension() implementation

BaseLib filename string manipulation rewrite.

Place it in StringTools.

Use extractBaseName() now.

And also add ExtractBaseNameWithoutExtension tests.

Replace getFileNameFromPath(f, true/false) with corresponding extractBaseName() and extractBaseNameWithoutExtension().

Calling getFileNameFromPath() for now.

Both windows and unix versions.

This fixes #29.