rewrite draw unittest

See #10
rewrite module unittest

See #10.
rewrite particle unittest

See #10.
rewrite sys unittest

See #10.
rewrite main test function

See #10.
remove old test framewok

See #10.
update makefiles

+ Add FindCheck CMake module
+ Add Check library dependency
+ Rename test-runner executable

See #10
Merge branch 'switch-unittests-to-check' into develop

Close #10

* switch-unittests-to-check:
  update makefiles
  remove old test framewok
  rewrite main test function
  rewrite sys unittest
  rewrite particle unittest
  rewrite module unittest
  rewrite draw unittest