v0.1.0

PharmaceuticalClassification v0.1.0

Merged pull requests:

• Add the ability to build graphs from RxNorm files, and query those graphs for relationships (#1) (@DilumAluthge)
• Delete Manifest.toml (#2) (@DilumAluthge)
• Increase code coverage (#3) (@DilumAluthge)
• Add another unit test (#4) (@DilumAluthge)
• Clean up the examples (#5) (@DilumAluthge)
• Bump the version number from "0.1.0-DEV" to "0.1.0" (#6) (@DilumAluthge)
• Small improvements to the README and the documentation (#7) (@DilumAluthge)