Merge pull request #690 from fredizzimo/unit_test

Add Unit Testing support

Add unit test documentation

Another attempt to make keyboards and tests in parallel

Make tests and keyboards in two different jobs

Add -p parameter to mkdir

So that it's created even when there's a deeper structure

Travis builds the default all target

The all target makes all keyboards and all tests

Support for running and cleaning all tests

Disable map file creation when building tests

It causes strange linker warnings on cygwin.

Detect failures when running multiple tests

Also add better output.

Convert tirple_buffered_object_tests to GTest

Convert transport_tests to GTest

Convert frame_validator_tests to GTest

Convert frame_router_tests to GTest

More common settings for unit tests and keyboards

Fix running multiple tests

Running of unit tests

But only if the compilation has succeeded

Build actual tests, convert byte_stuffer_tests

Rules for compiling and linking google test

The makefile actually calls build_test