update travis for ecpy channel atom and don't quote python version

.travis.yml

@@ -3,17 +3,8 @@
 
 language: python
 python:
-  - "2.7"
-  - "3.5"
-env:
-  - ATOM=0.3
-  - ATOM=1.0
-matrix:
-  exclude:
-    - python: "3.5"
-      env: ATOM=0.3
-    - python: "2.7"
-      env: ATOM=1.0
+  - 2.7
+  - 3.5
 
 before_install:
   #install git lfs and fetch test data
@@ -28,7 +19,7 @@ install:
 
   # We do this conditionally because it saves us some downloading if the
   # version is the same.
-  - if [[ "$TRAVIS_PYTHON_VERSION" == "2.7" ]]; then
+  - if [[ "$TRAVIS_PYTHON_VERSION" == 2.7 ]]; then
       wget https://repo.continuum.io/miniconda/Miniconda2-latest-Linux-x86_64.sh -O miniconda.sh;
     else
       wget https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O miniconda.sh;
@@ -44,8 +35,11 @@ install:
   # Create conda environment with dependencies
   - conda create -q -n test-environment python=$TRAVIS_PYTHON_VERSION numpy bokeh h5py jupyter scipy networkx future
   - source activate test-environment
-  - if [[ $ATOM == 0.3 ]]; then conda install --yes atom; fi
-  - if [[ $ATOM == 1.0 ]]; then pip install cppy; pip install git+https://github.com/nucleic/atom.git@1.0.0-dev; fi
+  - if [[ "$TRAVIS_PYTHON_VERSION" == 2.7 ]]; then
+      conda install --yes atom;
+    else
+      conda install -c ecpy atom;
+    fi
   - pip install watchdog coveralls
 
 script: