Add Tgav Stub Component

.travis.yml

@@ -1,14 +1,35 @@
 language: python
+
 matrix:
   include:
-    - python: 3.6
-    - python: 3.7
+    - os: linux
       dist: xenial
+      python: 3.6
+    - os: linux
+      dist: xenial
+      python: 3.7
+
+before_install:
+  - |
+    sudo apt-get install -y lsb-release
+      sudo apt-key adv \
+        --keyserver keyserver.ubuntu.com \
+        --recv-keys E298A3A825C0D65DFD57CBB651716619E084DAB9
+      sudo add-apt-repository \
+        --yes \
+        "deb https://cloud.r-project.org/bin/linux/ubuntu/ $(lsb_release -c -s)-cran36/"
+      cat /etc/apt/sources.list
+      sudo apt-get update -qq
+      sudo apt-get install -y r-base
+
 cache: pip
+
 install:
+  - pip install -Iv rpy2==3.3.3
   - pip install git+https://github.com/JGCRI/gcam_reader
   - pip install git+https://github.com/JGCRI/tethys
   - pip install git+https://github.com/JGCRI/xanthos
   - pip install .
+
 script:
   - python -m unittest

cassandra/compfactory.py

@@ -11,9 +11,10 @@
     'GcamComponent': comp.GcamComponent,
     'FldgenComponent': comp.FldgenComponent,
     'HectorStubComponent': comp.HectorStubComponent,
+    'TgavStubComponent': comp.TgavStubComponent,
     'TethysComponent': comp.TethysComponent,
     'XanthosComponent': comp.XanthosComponent,
-    'DummyComponent': comp.DummyComponent,
+    'DummyComponent': comp.DummyComponent
 }