address #166 (comment)

CONDUCT.md

@@ -0,0 +1,25 @@
+# Contributor Code of Conduct
+
+As contributors and maintainers of this project, we pledge to respect all people who 
+contribute through reporting issues, posting feature requests, updating documentation,
+submitting pull requests or patches, and other activities.
+
+We are committed to making participation in this project a harassment-free experience for
+everyone, regardless of level of experience, gender, gender identity and expression,
+sexual orientation, disability, personal appearance, body size, race, ethnicity, age, or religion.
+
+Examples of unacceptable behavior by participants include the use of sexual language or
+imagery, derogatory comments or personal attacks, trolling, public or private harassment,
+insults, or other unprofessional conduct.
+
+Project maintainers have the right and responsibility to remove, edit, or reject comments,
+commits, code, wiki edits, issues, and other contributions that are not aligned to this 
+Code of Conduct. Project maintainers who do not follow the Code of Conduct may be removed 
+from the project team.
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by 
+opening an issue or contacting one or more of the project maintainers.
+
+This Code of Conduct is adapted from the Contributor Covenant 
+(http:contributor-covenant.org), version 1.0.0, available at 
+http://contributor-covenant.org/version/1/0/0/

README.md

@@ -41,6 +41,12 @@ The sf package:
 * provides fast I/O with GDAL and GEOS using [well-known-binary](https://en.wikipedia.org/wiki/Well-known_text#Well-known_binary) written in C++/Rcpp
 * directly reads from and writes to spatial databases such as [PostGIS](http://postgis.net/) using [DBI](https://cran.r-project.org/web/packages/DBI/index.html)
 
+### Contributing
+
+* Contributions of all sorts are most welcome, issues and pull requests are the preferred ways of sharing them. 
+* When contributing pull requests, please adhere to the package style (in package code use `=` rather than `<-`; don't change indentation; tab stops of 4 spaces are preferred)
+* This project is released with a [Contributor Code of Conduct](CONDUCT.md). By participating in this project you agree to abide by its terms.
+
 ### Acknowledgment
 
 This project is being realized with financial [support](https://www.r-consortium.org/projects) from the