Obey 1.0 / 1.5 library specification when finding C++ library source

Author: ianfixes

CHANGELOG.md

@@ -8,9 +8,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ## [Unreleased]
 ### Added
 - `arduino_ci_remote.rb` CLI switch `--skip-examples-compilation`
+- `CppLibrary.header_files` to find header files
 
 ### Changed
 - Move repository from https://github.com/ianfixes/arduino_ci to https://github.com/Arduino-CI/arduino_ci
+- `CppLibrary` functions returning C++ header or code files now respect the 1.0/1.5 library specification
 
 ### Deprecated
 - `arduino_ci_remote.rb` CLI switch `--skip-compilation`

SampleProjects/OnePointFiveDummy/NoBase.cpp

@@ -0,0 +1 @@
+This project resembles a "1.5 spec" library: it has `library.properties` and a `src/` directory that will be scanned recursively.  `utility/`, if present, will be ignored.