Adding simplified Chinese translation

VIPSWeb/locale/zh_CN/LC_MESSAGES/django.mo

VIPSWeb/locale/zh_CN/LC_MESSAGES/django.po

calculators/locale/zh_CN/LC_MESSAGES/django.mo

calculators/locale/zh_CN/LC_MESSAGES/django.po

forecasts/locale/zh_CN/LC_MESSAGES/django.mo

forecasts/locale/zh_CN/LC_MESSAGES/django.po

information/locale/zh_CN/LC_MESSAGES/django.mo

information/locale/zh_CN/LC_MESSAGES/django.po

observations/locale/zh_CN/LC_MESSAGES/django.mo

observations/locale/zh_CN/LC_MESSAGES/django.po

organisms/locale/zh_CN/LC_MESSAGES/django.mo

organisms/locale/zh_CN/LC_MESSAGES/django.po

vips_messages/locale/vi/LC_MESSAGES/django.mo

vips_messages/locale/zh_CN/LC_MESSAGES/django.mo

vips_messages/locale/zh_CN/LC_MESSAGES/django.po