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ARROW-4690: Building TensorFlow compatible wheels for Arrow

This includes a Dockerfile that can be used to create wheels based on ubuntu 14.04 which are compatible with TensorFlow.

TODO before this can be merged:
- [x] write documentation how to build this
- [x] do more testing

Author: Philipp Moritz <pcmoritz@gmail.com>

Closes #3766 from pcmoritz/ubuntu-wheels and squashes the following commits:

f708c29b <Philipp Moritz> remove tensorflow import check
599ce2e7 <Philipp Moritz> fix manylinux1 build instructions
f1fbedf8 <Philipp Moritz> remove tensorflow hacks
bf47f579 <Philipp Moritz> improve wording
4fb1d38b <Philipp Moritz> add documentation
078be98b <Philipp Moritz> add licenses
0ab0bccb <Philipp Moritz> cleanup
c7ab1395 <Philipp Moritz> fix
eae775d5 <Philipp Moritz> update
2820363e <Philipp Moritz> update
ed683309 <Philipp Moritz> update
e8c96ecf <Philipp Moritz> update
8a3b19e8 <Philipp Moritz> update
0fcc3730 <Philipp Moritz> update
fd387797 <Philipp Moritz> update
78dcf42d <Philipp Moritz> update
7726bb6a <Philipp Moritz> update
82ae4828 <Philipp Moritz> update
f44082ea <Philipp Moritz> update
deb30bfd <Philipp Moritz> update
50e40320 <Philipp Moritz> update
58f6c121 <Philipp Moritz> update
5e8ca589 <Philipp Moritz> update
5fa73dd5 <Philipp Moritz> update
595d0fe1 <Philipp Moritz> update
79006722 <Philipp Moritz> add libffi-dev
9ff5236d <Philipp Moritz> update
ca972ad0 <Philipp Moritz> update
60805e22 <Philipp Moritz> update
7a66ba35 <Philipp Moritz> update
1b56d1f1 <Philipp Moritz> zlib
eedef794 <Philipp Moritz> update
3ae2b5ab <Philipp Moritz> update
df297e1c <Philipp Moritz> add python build script
358e4f85 <Philipp Moritz> update
65afcebe <Philipp Moritz> update
11ccfc7e <Philipp Moritz> update
f1784245 <Philipp Moritz> update
b3039c8b <Philipp Moritz> update
9064c3ca <Philipp Moritz> update
c39f92a9 <Philipp Moritz> install tensorflow
ec4e2210 <Philipp Moritz> unicode
773ca2b6 <Philipp Moritz> link python
b690d64a <Philipp Moritz> update
5ce7f0d6 <Philipp Moritz> update
a9302fce <Philipp Moritz> install python-dev
f12e0cfe <Philipp Moritz> multibuild python 2.7
9342006b <Philipp Moritz> add git
ab2ef8e7 <Philipp Moritz> fix cmake install
cef997b5 <Philipp Moritz> install cmake and ninja
5d560faf <Philipp Moritz> add build-essential
adf2f705 <Philipp Moritz> add curl
f8d66963 <Philipp Moritz> remove xz
e439356e <Philipp Moritz> apt update
79fe557e <Philipp Moritz> add docker image for ubuntu wheel