Add number of skipped testcases

[dnozay]

based on @munkyu's pull request #130.

[codecov-io]

Current coverage is 91.43%

Merging #132 into master will decrease coverage by -7.83% as of 6488a75

@@            master    #132   diff @@
======================================
  Files           17      11     -6
  Stmts         1083    1039    -44
  Branches         0       0       
  Methods          0       0       
======================================
- Hit           1075     950   -125
  Partial          0       0       
- Missed           8      89    +81

Review entire Coverage Diff as of 6488a75

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[coveralls]

Coverage increased (+0.001%) to 99.263% when pulling da834fe on num-skipped into 334b6ea on master.