first implementation of Set. specs.
gems
exponential time decay spec
rspec conf
doc
project name change
clean up connection handling.
delta interface and spec.
switch set to factory method.
update readme for new interface
fix correct application of limit in delta.fetch
fix some rubocop layout bits.
add support for historical replay
add key scrubbing below a certain threshold
remove readme note
add redis config
only create one redis conn.
Update README.md
Update README.md
Update README.md