Slight improvement of testing framework.
Slight improvement of testing framework.

Now each test should implement usage:
 TEST_NAME TRUT_EXEC TMP_DIR
where
 TRUT_EXEC --- path to trut binary executable
 TMP_DIR   --- path to temporary directory where testing will be
               performed

githaff/tone,githaff/trut,githaff/tone,githaff/trut