moved functions getFileNameFromPath(), getSuffixFromPath(), copyPathToFileName() and extractPath() from files StringTools.{cpp,h} to files FileTools.{cpp,h}

moved functions trim(), replaceString(), splitString() and template functions number2str() and str2number() into namespace BaseLib

Merging BaseLib 1

- remove functions to manipulate file names because they exist in StringTools.h
- move implementations into cpp
- fix type, etc.

This reverts commit 27eb90b0.

This should fix #20.

This reverts commit e234ac36.

This fixes #21 and hopefully this works everywhere.

changed name of file AxisAlignedBoundingBox.h to AABB.h according to the style guid rule: class name equals file name

Conflicts:
	MeshLib/Elements/TemplateQuad.tpp
	MeshLib/Elements/TemplateTri.tpp

Integrating googletest framework