Fix up the .app files to correct version and files

Added a simple Elixir interface module for basic Erlog calls

Update generation of compiler flags for different Erlang versions

Cleanup documentation files

Fix severe bug in ets_key and add basic documentation

erlog_int.erl now uses maps for variable bindings when they exist

Fix erlog.app files

Greatly simplify Makefile fix handling of options

Fixed test code

Remove erlog_acan.erl as source

Fix arguments in retract_clause/3

Add a clause listing library

ignore rebar

handle empty local list in findall

Reformat comment text