Merge pull request #99 from utensil/85-provide-non-mergeable-status

Improvements on #87
Adjusted doxygen command for new Doxyfile location.
Merge pull request #101 from rhyolight/doxymove

Adjusted doxygen command for new Doxyfile location.
`mergeableState` should not be shown
Keep non-mergeable status wording harmony with Github's