Propagate Warnings and Test (#10)

* moves isd creation into correct py class

* Adds exception handling to RasterGM.

* CMake fix to find conda install so for csm.

* Adds warning list that CSM returns

* Catches CSM Warnings (and propagates as errors)

* Updates tests to use a mocked CSM obj (fixture)

* updates the build to run tests using the mocked fixture

* Updates to warn

* Updates after testing on linux, namespace issues fixed

* Updates to travis for future extension for multiple lang

* Updates to travis for future extension for multiple lang

* Missed $

* Updates to travis

* Missed -y in conda env creation

* Removes extra -y in env update

* Missing pytest dep.

* Adds missing csmapi dependency

* Adds gcc

* Trying to force compiler

* Adds gcc7 to linux

* Adds proper gxx install

* Compiler issues still

* Changes env to base

* Python issues with the env

* Ugghh:

* Ugghh

* Removes extra python installation

* Removes csmapi from env

* csmapi installation

* missed a dir change

* Trying to fix gcc issues

* Working to get the conda build fixed

* Trying to get build working