adds ability to generate in-memory tilespecs from pyTEM metadata, adds documentation.
What's Changed
* fix: wrong class method used by dlbrittain in https://github.com/AllenInstitute/em_stitch/pull/54
* Scope metadata by RussTorres in https://github.com/AllenInstitute/em_stitch/pull/55
* cleanup docstrings & imports by RussTorres in https://github.com/AllenInstitute/em_stitch/pull/56
* Develop by RussTorres in https://github.com/AllenInstitute/em_stitch/pull/57
New Contributors
* dlbrittain made their first contribution in https://github.com/AllenInstitute/em_stitch/pull/54
**Full Changelog**: https://github.com/AllenInstitute/em_stitch/compare/v0.3.3...v0.3.4