and attempt to build landlab/master when branch name is not 'release'

Author: kbarnhart

.travis.yml

@@ -34,6 +34,19 @@ install:
 - conda create -n _testing python=$TRAVIS_PYTHON_VERSION
 - source activate _testing
 - conda install scripting -c csdms-stack
+- |
+  if [[ "$TRAVIS_BRANCH" == "release" ]]; then
+    conda install landlab jupyter -c landlab
+  else
+    git clone --depth=50 https://github.com/landlab/landlab.git landlab/landlab
+    cd landlab/landlab
+    git fetch origin master
+    git checkout -qf master
+    git submodule update --init --recursive
+    conda install --file=requirements.txt
+    python setup.py develop
+    cd ../..
+  fi
 - conda install landlab jupyter -c landlab
 - conda info -a && conda list
 script: