rewrite from C++ to Python

Author: deanlee

selfdrive/pandad/.gitignore

@@ -1,3 +1 @@
-pandad
 pandad_api_impl.cpp
-tests/test_pandad_usbprotocol

selfdrive/pandad/SConscript

@@ -1,13 +1,4 @@
-Import('env', 'envCython', 'common', 'messaging')
-
-libs = ['usb-1.0', common, messaging, 'pthread']
-panda = env.Library('panda', ['panda.cc', 'panda_comms.cc', 'spi.cc'])
-
-env.Program('pandad', ['main.cc', 'pandad.cc', 'panda_safety.cc'], LIBS=[panda] + libs)
-env.Library('libcan_list_to_can_capnp', ['can_list_to_can_capnp.cc'])
+Import('envCython')
 
 pandad_python = envCython.Program('pandad_api_impl.so', 'pandad_api_impl.pyx', LIBS=["can_list_to_can_capnp", 'capnp', 'kj'] + envCython["LIBS"])
 Export('pandad_python')
-
-if GetOption('extras'):
-  env.Program('tests/test_pandad_usbprotocol', ['tests/test_pandad_usbprotocol.cc'], LIBS=[panda] + libs)