in order to make the name of libraries, namespaces and directories more consistent the Base directory is know named BaseLib

added test application for mesh reading, fixed some bugs, reading and creating a mesh is working now; Mesh is (for now) a friend of Node, this should be fixed soon.

changed size_t to unsigned; included a few (yet unimplemented) methods for mesh-consistency checking

git-subtree-dir: Base/logog
git-subtree-split: 9f14a8af27b0c2cfe4299d0b823798a0e3bb6198

Added doc make target for doxygen documentation generation. See http://ufz.github.com/devguide/configure-cmake-options for details.

fixed a small issue concerning compiling with OpenMP support

Wrapped OpenMP includes in #ifdefs.

- added test programm for solving a linear system with CG-method
- time measurement is at the moment OS dependent!
- added Base folder
- added GeoLib folder
- added files in MathLib folder - restructured MathLib folder

- applying changes to interfaces