Version 0.7

This release adds an ocean chemistry module that includes carbonate chemistry tracers as well as parametrizations for carbonate sedimentation/dissolution fluxes (after Boudreau 2010, et al.). ESBMTK now defaults to a python compatible naming scheme, where all ESBMTK objects follow a hierarchical scheme with the model at the root. This will break legacy code (including the current examples in the repository).