Merge pull request Kotlin#86 from nvlled/patch-1

Update README.md

README.md

@@ -6,15 +6,24 @@ Each exercise is created as a failing unit test and your job is to make it pass.
 
 #### How to build and run tests
 
-Working with the project using Intellij IDEA or Android Studio:
+##### Working with the project using Intellij IDEA or Android Studio:
 
 1. Import the project as Gradle project.
 2. To build the project and run tests use 'test' task on Gradle panel. 
 
-You can also build the project and run all tests in terminal:
+##### Working with the commandline
+You can also build the project and run all tests in the terminal:
 ```
 ./gradlew test
 ```
+But since running all the tests tend to take longer and the output can be
+cluttered, it's more ideal to run selected tests only:
+```
+$ ./gradlew test --tests i_*          # run tests in part 1
+$ ./gradlew test --tests ii_*         # run tests in part 2
+$ ./gradlew test --tests ii_*22*      # run test number 22 in part 2
+```
+
 Here https://www.jetbrains.com/help/idea/gradle.html you can read how to work with Gradle projects in IntelliJ IDEA.
 
 #### How to work with Koans using this project