adding new modules for feature development and updating imports in __init__
adding new subpackage to hold json encoded structure data
renaming fiofuncs to iofuncs
updating imports and docstrings
removing structure_converter module
updating docstring
removing structure_specs module
updating docstrings and imports
consolidating classes for fewer modules and easier workflow
renaming modules
fix bugs in import names and docstrings
updating docstrings and documentation link
updating google-analytics tracking ID and project link
moving google analytics code to extrahead block
updating setup for release of v0.2.19