VPP Python language binding - plugin support

- Moved Python generator tool to tools directory
- Added build-vpp-api Makefile target
- Generator now only creates a Python representation of the .api
  the rest of the framework is in the vpp_papi script
- Each plugin has its own namespace.
- Plugin Python files are installed in vpp_papi_plugins for easy
  use inside the build tree.

Change-Id: I272c83bb7e5d5e416bdbd8a790a3cc35c5a04e38
Signed-off-by: Ole Troan <ot@cisco.com>

vpp-api/python/setup.py

@@ -1,21 +1,16 @@
-from distutils.core import setup, Extension
-
-module1 = Extension('vpp_api',
-                    define_macros = [('MAJOR_VERSION', '1'),
-                                     ('MINOR_VERSION', '0')],
-                    include_dirs = ['pneum'],
-                    libraries = ['pneum'],
-                    library_dirs = ['../../build-root/install-vpp_debug-native/vpp-api/lib64'],
-                    sources = ['vpp_papi/pneum_wrap.c'])
+try:
+    from setuptools import setup
+except ImportError:
+    from distutils.core import setup
 
 setup (name = 'vpp_papi',
-       version = '1.0',
+       version = '1.1',
        description = 'VPP Python binding',
        author = 'Ole Troan',
        author_email = 'ot@cisco.com',
        #url = 'https://docs.python.org/extending/building',
+       test_suite = 'tests',
        packages=['vpp_papi'],
        long_description = '''
 VPP Python language binding.
-''',
-       ext_modules = [module1])
+''',)