doc/manual: more precisions (thanks Joe)
add autobuild git hook

for simple preconfigured autobuilder
add python requirements.txt and .travis.yml
README.rst: add travis badge
test.full_stack: add ARTIQ_NO_HARDWARE environment variable
travis: add more version info
travis: add numpydoc to conda install
travis: llvmpy version
travis: use patched llvmpy branch