07_Astree: Adds new exercise

07_Astree/CMakeLists.txt

07_Astree/build/.keepdir

07_Astree/cmake/Doxyfile.in

07_Astree/cmake/UseEcos.cmake

07_Astree/cmake/armM4.toolchain

07_Astree/cmake/cccc.cmake

07_Astree/cmake/coloroutput.cmake

07_Astree/cmake/compilerwarnings.cmake

07_Astree/cmake/cppcheck.cmake

07_Astree/cmake/doxy.cmake

07_Astree/cmake/emu.cmake

07_Astree/cmake/framac.cmake

07_Astree/cmake/lcov.cmake

07_Astree/cmake/processorcount.cmake

07_Astree/cmake/sanitizer.cmake

07_Astree/include/ab_filter.h

07_Astree/include/astree.h

07_Astree/include/queue.h

07_Astree/include/queue_alloc.h

07_Astree/include/queue_element.h