GitLab

* remove unused LibraryDir from legacy context

* remove unused WatchedLocation from legacy context

* remove unused IgnoreSketchFolderNameErrors from legacy context

* remove CanUseCachedTools from legacy context

* remove UseArduinoPreprocessor from legacy context

* make the CoreBuilder command a function

* remove the use of context from builder_utils

* mvoe types.ProgressStruct in a dedicated pkg

* move ExecCommand under arduino/utils

* move LogIfVerbose from utils to legacy builder

* move some legacy constans in builder package

* move builder_utils under arduino/builder/utils pkg

* appease golint

* move coreBuildCachePath in the arduino Builder

* refactor Linker command in a function

* refactor SketchBuilder in a function

* refactor LibrariesBuilder in a function

* refactor Sizer in a function

* remove empty file

* remove unused struct FailIfBuildPathEqualsSketchPath