Use fail instead of u# in the first test

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
koans.conditions: Drop the run 2 test, add another instead

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
project.clj: Add tools.macro

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
playground.puzzle: Add two puzzles

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>