Merge pull request #5 from voltrb/ja

ja translation update
started documenting heroku setup
added mongo config
Update heroku.md
added deployment to the index
Merge branch 'heroku' of github.com:falti/docs into heroku
Fix typo in ja/store_collections
Remove overlaps and fix wrong examples in ja/flash_collection
Merge pull request #7 from renhx/fix-typos

Fix a typo and broken code samples in ja
working on users docs
Merge branch 'master' into users
started on users
Merge pull request #6 from falti/heroku

documented heroku setup
update docs for heroku
Update ja translation