Merge pull request #201 from Bihaqo/full_tf2_support

Full tf2 support + dropping support for Python 2 + dropping support for TF v < 1.15.2

.travis.yml

@@ -1,21 +1,20 @@
 dist: trusty
 language: python
 python:
-  - "2.7"
   - "3.5"
   - "3.6"
 env:
   matrix:
-    - TF_VERSION=1.13.2
-    - TF_VERSION=1.15
+    - TF_VERSION=1.15.2
     - TF_VERSION=2.0
 # command to install dependencies
 install:
   - pip install --upgrade pip
   - pip install tensorflow==$TF_VERSION
   - pip install coveralls
-# command to run tests
 script:
-  nosetests  --logging-level=WARNING --with-coverage --cover-package=t3f
+  # Run eager and no-eager tests separately.
+  - nosetests t3f/*_no_eager_test.py --logging-level=WARNING --with-coverage --cover-package=t3f
+  - nosetests -e='*no_eager*' --logging-level=WARNING --with-coverage --cover-package=t3f
 after_success:
   coveralls

docs/installation.rst

@@ -3,7 +3,7 @@
 Installation
 ============
 
-T3f assumes you have Python 2.7, 3.5 or 3.6 and a working TensorFlow installation (tested versions are from 1.13 to 2.0 (TF 2.0 is only supported in compat.v1 mode), see here_ for TF installation instructions).
+T3f assumes you have Python 3.5 or 3.6 and a working TensorFlow installation (tested versions are from 1.15.2 to 2.0, see here_ for TF installation instructions).
 
 .. _here: https://www.tensorflow.org/install/