Mixed6

Fix doc inclusion in `sdist`s

Better error message to help debug travis problem

Buildbot split job

Revert a change to try to fix travis on master. It is the only think I think could cause this. I still don't understand what is going on.

Fix the recommended compiler so that it matches the platform instructructions

fix gh-4786. I chekc all LocalOptGroup and in2out and out2in and those 2 optimizations are the only one I think need apply_all_opts=True.

remove python2x.py, fix imports associated with it

delete options 'full' and 'economic' in test_qr_modes

Test min version and more recent version of NumPy and SciPy.

Drop support for python 2.6 in CDataType

Fix optimization order and jenkins

Fix error reported

Add a metaclass implementation of __props__ and generalize it to all theano objects

Drop old version

add xunit to jenkins pretest