* Checks for a specific number of NOTEs
* Fixed the bug that failing commands did NOT result in failing tests by pulling
  most of the comamnds back into travis.yml and surroundeed the ones in the
  helper with set -x. All failing commands in travis.yml will fail the tests, all
  commmands in the helper will abort the travis run -> only put commands in the
  helper which will completly scre up the tests, things like installation commands
* Now tests on Mac OS X
* Uses a specific build matrix so that only 10 tests are run

wc -l seems to output the number of lines with a leading space, which trips the test as `"5" != " 5"` ?

set -e seems to not work as intended in a bash function, so a error in one of
the individual steps wouldn't abort the build.