implement retries

Implement generic retry (#15)

Simple, pluggable retry system.  Supports constant and exponential retries for now

better topsort

v0.0.6

new release

add reduce func

Merge pull request #9 from pluralsh/add-reduce

Add Reduce implementation

v0.0.4: Merge pull request #5 from pluralsh/random

add methods to generate random integers and strings

implement set

Merge pull request #2 from pluralsh/set-impl

Implement set

add graph datastructure

v0.0.2

add graph datastructure

Initial Release

Merge pull request #1 from pluralsh/initial-commit

Initial utils for golly