Update ExcuseGenerator.js

Fix typo
Update ExcuseGenerator.js

Port some grammar fixes back from my experimental version
comma missing
spelling fix
Update ExcuseGenerator.js
Update ExcuseGenerator.js

fix typo
Merge pull request #1 from Random832/gh-pages

merge back to master
Merge pull request #2 from Random832/master

Suggested changes (grammar etc)
Merge branch 'master' of https://github.com/eternaldensity/Excuse-Generator into gh-pages