provide more information on the sample projects

Author: ianfixes

SampleProjects/README.md

@@ -1,4 +1,7 @@
 Arduino Sample Projects
 =======================
 
-This directory contains example projects that are meant to be built with this gem.  Except "TestSomething". That one's just a beater for CI testing and includes some tests that are designed to fail (to test negative inputs).
+This directory contains example projects that are meant to be built with this gem.
+
+* "DoSomething" is a bare implementation of a library with a test.  Test files prefixed with "bad-" are expected to fail; this is checked as part of the testing on arduino_ci itself.
+* "TestSomething" contains a minimial library, but tests for all the mock features of arduino_ci.