Move tests back to 'examples', skip non-testable examples when testing.

This fixes https://github.com/sudar/Arduino-Makefile/issues/259.
Move scripts inside tests directory.

Fixed https://github.com/sudar/Arduino-Makefile/issues/260
Remove old dependencies dir from .gitignore, now stored in /var/tmp.
Merge pull request #268 from peplin/259-move-examples

Move tests back to 'examples', skip non-testable examples when testing.

Fix #259
Fix #260