Add ATSPI SWIG interface file and cmake instructions for SWIG python

[spectranaut]

closes #5

I did some renaming because SWIG uses the word "wrapper" for it's intermediary c++ files.

So now it is "atspi" node, and the library I renamed to "atspi_inspect".

This does not build however, I'm getting the error:

spectranaut:~/repos/AXAccess/build$ make
[ 12%] Building CXX object lib/atspi/CMakeFiles/atspi_inspect.dir/atspi_node.cc.o
[ 25%] Building CXX object lib/atspi/CMakeFiles/atspi_inspect.dir/linux_utils.cc.o
[ 37%] Linking CXX static library libatspi_inspect.a
[ 37%] Built target atspi_inspect
[ 50%] Building CXX object lib/atspi/CMakeFiles/dump_tree_atspi.dir/dump_tree_atspi.cc.o
[ 62%] Linking CXX executable dump_tree_atspi
[ 62%] Built target dump_tree_atspi
[ 75%] Swig compile atspi_inspect.i for python
[ 75%] Built target atspi_python_inspect_swig_compilation
[ 87%] Building CXX object lib/atspi/CMakeFiles/atspi_python_inspect.dir/CMakeFiles/atspi_python_inspect.dir/atspi_inspectPYTHON_wrap.cxx.o
[100%] Linking CXX shared module _atspi_python_inspect.so
/usr/bin/ld: libatspi_inspect.a(linux_utils.cc.o): warning: relocation against `_ZSt4cerr@@GLIBCXX_3.4' in read-only section `.text'
/usr/bin/ld: libatspi_inspect.a(atspi_node.cc.o): relocation R_X86_64_PC32 against symbol `_ZSt4cerr@@GLIBCXX_3.4' can not be used when making a shared object; recompile with -fPIC
/usr/bin/ld: final link failed: bad value
collect2: error: ld returned 1 exit status
make[2]: *** [lib/atspi/CMakeFiles/atspi_python_inspect.dir/build.make:99: lib/atspi/_atspi_python_inspect.so] Error 1
make[1]: *** [CMakeFiles/Makefile2:172: lib/atspi/CMakeFiles/atspi_python_inspect.dir/all] Error 2
make: *** [Makefile:91: all] Error 2

Update: error fixed, I need to make the atspi_inspect library a shared library