Add test for install of pyqpbo library, modify .travis.yml to fix path
problems in finding installed pyqpbo library
Merge pull request #19 from fgregg/master

Begining of test for installation of inference methods
TST before running the switch_to ad3 test, test that ad3 is actually installed.
point to andrea's pyqpbo repo in requirements
Merge pull request #21 from fgregg/patch-1

point to andrea's pyqpbo repo in requirements
install ad3 from github test for ad3
typo
point to my AD3 to check if pyad3 can be built by pip
install cython before requirements which depend upon cython
typo
trigger travis
AD3 to ad3 in inference methods
only catch pass on import errors in get_installed
point to pystruct AD3
Merge pull request #22 from fgregg/master

AD3 installed with pip