Skip Dopri/Radau tests on FreeBSD 10
Remove temp var
Remove redundant 'try/except' blocks
Extract 'lsodar' integrator to separate file

--HG--
extra : histedit_source : 52fffbaf0d4360ae558964a7da76188905d8c69d
Py3: force using absolute imports and 'print' function in 'test_lsodar.py'
LSODAR: return 'Trajectory'
Bump last SciPy version
Py3: force using absolute imports and 'print' function
Merge changes from 'develop' branch