adds build badge

adds .drone

updates version number for 0.0.3 release

updates readme with changelog

adds type spec

adds method to calculate a networks start address

adds function from network bit to netmask

adds function from network bit to netmask

wrote tests to check for correct handling of network start

adds function for conversion of multiple network to list of ip

adds readme

adds rebar.lock

removes redundant export

tests tuple version of network_to_ip

tests string version of ip_to_decimal