ba_check_and_set_bit (#54)

* add bit array check and set
* update changelog

add CHANGELOG.md

additional badges

Feature/testing (#35)

* add basis for minunit.h
* add license and author information to c files
* update readme

Graph OpenMP support (#33)

* first portion of openmp support - critical sections
* atomic increment and decrements
* add ability to run test with openmp turned on
* fix makefile and micro optimizations for stringlib
* reduce scope of variable
* larger test range for the timing

Feature/graphs (#28)

* first cut; not complete

* fix the test template

* additional graph functionality and tests

* add the graph test to ci

* more tests

* add iterate over verticies macro

* add iterators and test them; add pointers to out edges for each vertex for easier traversal

* valgrind fixes

* update naming convention; document funtions

* update readme and docs

* fix the need for success and failure macros

* add some graph examples; a few more functions

* add tests for updating metadata

* add a few additional edge case tests

* typo

ensure same order of items from list dir