TNode: move documentation to the right place
Section: derive from & impl. TNode; remove findSections()

Use collectIf() in File and TestSection
Section: remove sectionCount obsoleted by childCount
Section: remove getSection obsoleted by getChild
CMake: add Doxygen support to enable make doc
CMake: Add Doxyfile.in for doxygen support
DataTag support in Block
fixes in DataTag
initial test for DataTags
XCode: update project file
[tests] TestAll: enable command line test selection
CMake: basic test support
[test] TestAll -> Runner: move directly to test

The Runner binary will from now on be the binary through which
all tests will be run.
All source will also be located directly under the "test" dir.
All tests are disabled for now.
[test] TestBlock: move to parent dir and re-enable
[test] TestBlock: remove main method from TestBlock.cpp
[test] TestCharon: move and re-enable
[test] CMake: add Test*.cpp to Runner sources
CMake: Add boost output
[test] TestCharon: kill main() and move implementation to cpp
[test] TestGroup: move file and implementation to cpp