Add Comparable mix-in and MACRO_CASE StrEnum
Merge pull request #10 from irgeek/comparable * Add a Comparable mix-in * Add a MACRO_CASE StrEnum * Add RTD documentation - https://strenum.readthedocs.io/en/latest/ * Drop Python 3.5 in tests
Merge pull request #10 from irgeek/comparable * Add a Comparable mix-in * Add a MACRO_CASE StrEnum * Add RTD documentation - https://strenum.readthedocs.io/en/latest/ * Drop Python 3.5 in tests