Update index.ja.json

modify some sentences or words into more familiar expression.
Update index.nb_NO.json

Fixed typos/grammar
Update index.nl.json

Make it clear it's pre-alpha in Dutch
Belarusian translation
Create index.cs.json
Proper index.ro.json translation
Minor fixes
Minor fixes
Update and rename index.en.json to index.sk.json

Adding translation for Slovak language.
Finnish language nitpicking
Merge pull request #65 from enukane/update-ja

Update index.ja.json
Merge pull request #66 from chinatsun/patch-1

Fixed typos/grammar in index.nb_NO.json
Merge pull request #67 from kingkorf/master

Update index.nl.json
Merge pull request #68 from wizardist/translation/be

Belarusian translation
Merge pull request #69 from Theon144/master

Create index.cs.json (Czech translation)
Merge pull request #71 from z0id/patch-1

Updated romanian translation for the website.
Merge pull request #73 from aasami/patch-1

Update and rename index.en.json to index.sk.json
Merge pull request #74 from mmalmi/master

Finnish language nitpicking
Disable download button, re-add en.json

ALL LANGUAGES MUST UPDATE
coming soon; have to re-add