Update and rename en.json to zh-cn.json

simplified chinese translation
Update zh-cn.json
adding a meshnet category
Update en.json

Found 2 errors.
Revert "adding a meshnet category"

This reverts commit 6341cc5dcd416d8e3687eeb8dde1969413260ec6.
Update de.json

Found additional formality errors and more elegant word order constellations. The translation was really nice some hours ago, now it's superb :-) "Passing the ball" between me and QSDev makes the translation great. You can't see all the mistakes alone. Best regards -MenMan
adding a meshnet category
images for projectmeshnet
update duckduckgo sources page
Merge pull request #176 from MenMan/patch-5

Update en.json
Merge pull request #177 from MenMan/patch-6

Update de.json
Merge pull request #178 from rodrigopimentel/meshnet

Meshnet category
Merge pull request #179 from csolisr/master

Updated Spanish translation
improved readability of tags
add json stubs for meshnet
improve rtl support
added rtl support for table headers, add missing json stub to ar.json
Update de.json

おはよう Peng-Senpai and good morning from Germany :-)
Merge pull request #180 from MenMan/patch-7

Update de.json
Update de.json

I'm sorry! I made a paragraph mistake. Hopefully fixed now.