Create CONTRIBUTING.md
Update settings.php

cherrypick proposed changes of #9
Update CONTRIBUTING.md
enable use of user account

add optional field for twitter user, next to site account.

todo: @araname can you update/provide the ko translation for
```$lang['twitterUserName'] = 'Twitter account name of the author';``` ?
version update
Update settings.php
translation update
Merge pull request #10 from araname/master

Translation update (ko)
add support for altitude
Update settings.php

adding French translation contributed in #11