Easyvvuq

Very minor changes to the build process in order to prepare for release of an anaconda package.

Testing the push to pypi workflow

Quick fix to the MANIFEST.in file

New Features

* Point Collocation method for PCE sampling.
* GaussianProcessSurrogate class which will serve as a basis and testing ground for surrogate based workflows
* Added quasirandom sampling classes: LHCSampler and HaltonSampler.
* JSONDecoder class. It allows codes to use JSON as output format.

Updates

* Started measuring test coverage using coveralls
* Numerous bug fixes