added releasing guidelines

Author: pwittchen

README.md

@@ -26,6 +26,7 @@ Contents
 - [Tests](#tests)
 - [Code style](#code-style)
 - [Static code analysis](#static-code-analysis)
+- [Releasing](#releasing)
 - [References](#references)
 - [License](#license)
 
@@ -203,6 +204,11 @@ Static code analysis runs Checkstyle, FindBugs, PMD and Lint. It can be executed
 
 Reports from analysis are generated in `library/build/reports/` directory.
 
+Releasing
+----------
+
+See [RELEASING.md](https://github.com/pwittchen/ReactiveSensors/blob/RxJava3.x/RELEASING.md) file.
+
 References
 ----------
 - [Sensors Overview](http://developer.android.com/guide/topics/sensors/sensors_overview.html)

RELEASING.md

@@ -0,0 +1,15 @@
+Releasing Guidelines
+====================
+
+In order to release new version of the library, we need to perform the following operations:
+- create new release issue on GitHub
+- prepare release notes and put them to the issue
+- verify, commit and push changes to `gh-pages` branch
+- checkout to the appropriate branch (`RxJava1.x` or `RxJava2.x` or `RxJava3.x`)
+- bump library version (`VERSION_NAME` and `VERSION_CODE`) in `gradle.properties` file
+- commit and push the changes
+- run command: `./gradlew clean build test check uploadArchives closeAndReleaseRepository`
+- wait for the Maven Sync (up to 48 hours)
+- when sync is done, checkout to the `RxJava3.x` branch
+- update `CHANGELOG.md` file with new release version, current date and release notes
+- create new tagged GitHub release with name the same as `VERSION_NAME` from `gradle.properties` and release notes