Create folder for Simplified Chinese
translated top level pages
add more translation
add translation for distribution and download pages.
merged branch thecodecentral/master (PR #53)

This PR was merged into the master branch.

Discussion
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[wip] [zh_CN] Simplified Chinese translation

Commits
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92eb179 add translation for distribution and download pages.
7dae101 add more translation
3d7b5c9 translated top level pages
978fe16 Create folder for Simplified Chinese